Home / 21,438.16-29,572.39-12,484.69

Finding the Fourth Proportional to 21,438.16, 29,572.39 and 12,484.69

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Solution

The fourth proportional to 21,438.16, 29,572.39 and 12,484.69 is: 17,221.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.16 : 29,572.39 = 12,484.69 : x
  2. Step 2: Convert to fraction form
    21,438.16/29,572.39 = 12,484.69/x
  3. Step 3: Cross multiply
    21,438.16x = 29,572.39 × 12,484.69
  4. Step 4: Simplify right side
    21,438.16x = 369,202,063.38
  5. Step 5: Solve for x
    x = 369,202,063.38/21,438.16
  6. Step 6: Final answer
    x = 17,221.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.