Home / 20,680.52-31,017.84-6,638.72

Finding the Fourth Proportional to 20,680.52, 31,017.84 and 6,638.72

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Solution

The fourth proportional to 20,680.52, 31,017.84 and 6,638.72 is: 9,957.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.52 : 31,017.84 = 6,638.72 : x
  2. Step 2: Convert to fraction form
    20,680.52/31,017.84 = 6,638.72/x
  3. Step 3: Cross multiply
    20,680.52x = 31,017.84 × 6,638.72
  4. Step 4: Simplify right side
    20,680.52x = 205,918,792.87
  5. Step 5: Solve for x
    x = 205,918,792.87/20,680.52
  6. Step 6: Final answer
    x = 9,957.14

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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.