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Finding the Fourth Proportional to 8,646.72, 11,929.20 and 5,459.10

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Solution

The fourth proportional to 8,646.72, 11,929.20 and 5,459.10 is: 7,531.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,646.72 : 11,929.20 = 5,459.10 : x
  2. Step 2: Convert to fraction form
    8,646.72/11,929.20 = 5,459.10/x
  3. Step 3: Cross multiply
    8,646.72x = 11,929.20 × 5,459.10
  4. Step 4: Simplify right side
    8,646.72x = 65,122,695.72
  5. Step 5: Solve for x
    x = 65,122,695.72/8,646.72
  6. Step 6: Final answer
    x = 7,531.49

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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.