Home / 20,872.88-31,319.52-9,184.64

Finding the Fourth Proportional to 20,872.88, 31,319.52 and 9,184.64

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Solution

The fourth proportional to 20,872.88, 31,319.52 and 9,184.64 is: 13,781.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.88 : 31,319.52 = 9,184.64 : x
  2. Step 2: Convert to fraction form
    20,872.88/31,319.52 = 9,184.64/x
  3. Step 3: Cross multiply
    20,872.88x = 31,319.52 × 9,184.64
  4. Step 4: Simplify right side
    20,872.88x = 287,658,516.17
  5. Step 5: Solve for x
    x = 287,658,516.17/20,872.88
  6. Step 6: Final answer
    x = 13,781.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.