Home / 20,990.41-31,484.96-8,507.08

Finding the Fourth Proportional to 20,990.41, 31,484.96 and 8,507.08

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Solution

The fourth proportional to 20,990.41, 31,484.96 and 8,507.08 is: 12,760.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.41 : 31,484.96 = 8,507.08 : x
  2. Step 2: Convert to fraction form
    20,990.41/31,484.96 = 8,507.08/x
  3. Step 3: Cross multiply
    20,990.41x = 31,484.96 × 8,507.08
  4. Step 4: Simplify right side
    20,990.41x = 267,845,073.52
  5. Step 5: Solve for x
    x = 267,845,073.52/20,990.41
  6. Step 6: Final answer
    x = 12,760.35

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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.