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Finding the Fourth Proportional to 18,965.31, 28,439.17 and 11,070.10

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Solution

The fourth proportional to 18,965.31, 28,439.17 and 11,070.10 is: 16,600.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.31 : 28,439.17 = 11,070.10 : x
  2. Step 2: Convert to fraction form
    18,965.31/28,439.17 = 11,070.10/x
  3. Step 3: Cross multiply
    18,965.31x = 28,439.17 × 11,070.10
  4. Step 4: Simplify right side
    18,965.31x = 314,824,455.82
  5. Step 5: Solve for x
    x = 314,824,455.82/18,965.31
  6. Step 6: Final answer
    x = 16,600.02

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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.