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Finding the Fourth Proportional to 7,400.08, 10,202.16 and 7,170.76

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Solution

The fourth proportional to 7,400.08, 10,202.16 and 7,170.76 is: 9,886.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,400.08 : 10,202.16 = 7,170.76 : x
  2. Step 2: Convert to fraction form
    7,400.08/10,202.16 = 7,170.76/x
  3. Step 3: Cross multiply
    7,400.08x = 10,202.16 × 7,170.76
  4. Step 4: Simplify right side
    7,400.08x = 73,157,240.84
  5. Step 5: Solve for x
    x = 73,157,240.84/7,400.08
  6. Step 6: Final answer
    x = 9,886.01

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Half scale
Find fourth proportional to 14,800.16, 20,404.32 and 14,341.52
Double scale
Find fourth proportional to 7,401.08, 10,203.54 and 7,171.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.