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Finding the Fourth Proportional to 18,854.31, 28,281.04 and 9,491.82

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Solution

The fourth proportional to 18,854.31, 28,281.04 and 9,491.82 is: 14,237.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.31 : 28,281.04 = 9,491.82 : x
  2. Step 2: Convert to fraction form
    18,854.31/28,281.04 = 9,491.82/x
  3. Step 3: Cross multiply
    18,854.31x = 28,281.04 × 9,491.82
  4. Step 4: Simplify right side
    18,854.31x = 268,438,411.31
  5. Step 5: Solve for x
    x = 268,438,411.31/18,854.31
  6. Step 6: Final answer
    x = 14,237.51

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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.