Home / 20,870.19-31,304.96-6,638.47

Finding the Fourth Proportional to 20,870.19, 31,304.96 and 6,638.47

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Solution

The fourth proportional to 20,870.19, 31,304.96 and 6,638.47 is: 9,957.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.19 : 31,304.96 = 6,638.47 : x
  2. Step 2: Convert to fraction form
    20,870.19/31,304.96 = 6,638.47/x
  3. Step 3: Cross multiply
    20,870.19x = 31,304.96 × 6,638.47
  4. Step 4: Simplify right side
    20,870.19x = 207,817,004.61
  5. Step 5: Solve for x
    x = 207,817,004.61/20,870.19
  6. Step 6: Final answer
    x = 9,957.60

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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.