Home / 21,064.47-29,069.17-11,989.39

Finding the Fourth Proportional to 21,064.47, 29,069.17 and 11,989.39

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Solution

The fourth proportional to 21,064.47, 29,069.17 and 11,989.39 is: 16,545.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,064.47 : 29,069.17 = 11,989.39 : x
  2. Step 2: Convert to fraction form
    21,064.47/29,069.17 = 11,989.39/x
  3. Step 3: Cross multiply
    21,064.47x = 29,069.17 × 11,989.39
  4. Step 4: Simplify right side
    21,064.47x = 348,521,601.12
  5. Step 5: Solve for x
    x = 348,521,601.12/21,064.47
  6. Step 6: Final answer
    x = 16,545.47

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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.