Home / 20,319.42-28,042.91-11,705.90

Finding the Fourth Proportional to 20,319.42, 28,042.91 and 11,705.90

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Solution

The fourth proportional to 20,319.42, 28,042.91 and 11,705.90 is: 16,155.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.42 : 28,042.91 = 11,705.90 : x
  2. Step 2: Convert to fraction form
    20,319.42/28,042.91 = 11,705.90/x
  3. Step 3: Cross multiply
    20,319.42x = 28,042.91 × 11,705.90
  4. Step 4: Simplify right side
    20,319.42x = 328,267,500.17
  5. Step 5: Solve for x
    x = 328,267,500.17/20,319.42
  6. Step 6: Final answer
    x = 16,155.36

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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.