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Finding the Fourth Proportional to 10,905.16, 15,040.98 and 7,364.68

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Solution

The fourth proportional to 10,905.16, 15,040.98 and 7,364.68 is: 10,157.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.16 : 15,040.98 = 7,364.68 : x
  2. Step 2: Convert to fraction form
    10,905.16/15,040.98 = 7,364.68/x
  3. Step 3: Cross multiply
    10,905.16x = 15,040.98 × 7,364.68
  4. Step 4: Simplify right side
    10,905.16x = 110,772,004.59
  5. Step 5: Solve for x
    x = 110,772,004.59/10,905.16
  6. Step 6: Final answer
    x = 10,157.76

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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.