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Finding the Fourth Proportional to 18,862.31, 28,293.47 and 5,011.31

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Solution

The fourth proportional to 18,862.31, 28,293.47 and 5,011.31 is: 7,516.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,862.31 : 28,293.47 = 5,011.31 : x
  2. Step 2: Convert to fraction form
    18,862.31/28,293.47 = 5,011.31/x
  3. Step 3: Cross multiply
    18,862.31x = 28,293.47 × 5,011.31
  4. Step 4: Simplify right side
    18,862.31x = 141,787,349.15
  5. Step 5: Solve for x
    x = 141,787,349.15/18,862.31
  6. Step 6: Final answer
    x = 7,516.97

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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.