Home / 21,377.58-29,500.40-11,816.90

Finding the Fourth Proportional to 21,377.58, 29,500.40 and 11,816.90

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Solution

The fourth proportional to 21,377.58, 29,500.40 and 11,816.90 is: 16,306.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,377.58 : 29,500.40 = 11,816.90 : x
  2. Step 2: Convert to fraction form
    21,377.58/29,500.40 = 11,816.90/x
  3. Step 3: Cross multiply
    21,377.58x = 29,500.40 × 11,816.90
  4. Step 4: Simplify right side
    21,377.58x = 348,603,070.17
  5. Step 5: Solve for x
    x = 348,603,070.17/21,377.58
  6. Step 6: Final answer
    x = 16,306.95

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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.