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Finding the Fourth Proportional to 7,430.70, 11,146.05 and 7,066.20

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Solution

The fourth proportional to 7,430.70, 11,146.05 and 7,066.20 is: 10,599.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,430.70 : 11,146.05 = 7,066.20 : x
  2. Step 2: Convert to fraction form
    7,430.70/11,146.05 = 7,066.20/x
  3. Step 3: Cross multiply
    7,430.70x = 11,146.05 × 7,066.20
  4. Step 4: Simplify right side
    7,430.70x = 78,760,218.51
  5. Step 5: Solve for x
    x = 78,760,218.51/7,430.70
  6. Step 6: Final answer
    x = 10,599.30

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.