Home / 21,363.80-29,479.18-11,930.68

Finding the Fourth Proportional to 21,363.80, 29,479.18 and 11,930.68

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Solution

The fourth proportional to 21,363.80, 29,479.18 and 11,930.68 is: 16,462.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,363.80 : 29,479.18 = 11,930.68 : x
  2. Step 2: Convert to fraction form
    21,363.80/29,479.18 = 11,930.68/x
  3. Step 3: Cross multiply
    21,363.80x = 29,479.18 × 11,930.68
  4. Step 4: Simplify right side
    21,363.80x = 351,706,663.24
  5. Step 5: Solve for x
    x = 351,706,663.24/21,363.80
  6. Step 6: Final answer
    x = 16,462.74

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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.