Home / 16,990.38-23,445.01-9,920.90

Finding the Fourth Proportional to 16,990.38, 23,445.01 and 9,920.90

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Solution

The fourth proportional to 16,990.38, 23,445.01 and 9,920.90 is: 13,689.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,990.38 : 23,445.01 = 9,920.90 : x
  2. Step 2: Convert to fraction form
    16,990.38/23,445.01 = 9,920.90/x
  3. Step 3: Cross multiply
    16,990.38x = 23,445.01 × 9,920.90
  4. Step 4: Simplify right side
    16,990.38x = 232,595,670.72
  5. Step 5: Solve for x
    x = 232,595,670.72/16,990.38
  6. Step 6: Final answer
    x = 13,689.85

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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.