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Finding the Fourth Proportional to 14,358.60, 21,537.90 and 14,139.90

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Solution

The fourth proportional to 14,358.60, 21,537.90 and 14,139.90 is: 21,209.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,358.60 : 21,537.90 = 14,139.90 : x
  2. Step 2: Convert to fraction form
    14,358.60/21,537.90 = 14,139.90/x
  3. Step 3: Cross multiply
    14,358.60x = 21,537.90 × 14,139.90
  4. Step 4: Simplify right side
    14,358.60x = 304,543,752.21
  5. Step 5: Solve for x
    x = 304,543,752.21/14,358.60
  6. Step 6: Final answer
    x = 21,209.85

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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.