Home / 21,613.67-32,420.40-8,456.76

Finding the Fourth Proportional to 21,613.67, 32,420.40 and 8,456.76

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Solution

The fourth proportional to 21,613.67, 32,420.40 and 8,456.76 is: 12,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,613.67 : 32,420.40 = 8,456.76 : x
  2. Step 2: Convert to fraction form
    21,613.67/32,420.40 = 8,456.76/x
  3. Step 3: Cross multiply
    21,613.67x = 32,420.40 × 8,456.76
  4. Step 4: Simplify right side
    21,613.67x = 274,171,541.90
  5. Step 5: Solve for x
    x = 274,171,541.90/21,613.67
  6. Step 6: Final answer
    x = 12,685.10

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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.