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Finding the Fourth Proportional to 18,854.71, 28,280.07 and 9,490.91

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Solution

The fourth proportional to 18,854.71, 28,280.07 and 9,490.91 is: 14,235.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.71 : 28,280.07 = 9,490.91 : x
  2. Step 2: Convert to fraction form
    18,854.71/28,280.07 = 9,490.91/x
  3. Step 3: Cross multiply
    18,854.71x = 28,280.07 × 9,490.91
  4. Step 4: Simplify right side
    18,854.71x = 268,403,457.76
  5. Step 5: Solve for x
    x = 268,403,457.76/18,854.71
  6. Step 6: Final answer
    x = 14,235.36

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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.