Home / 20,985.46-31,489.14-8,514.70

Finding the Fourth Proportional to 20,985.46, 31,489.14 and 8,514.70

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Solution

The fourth proportional to 20,985.46, 31,489.14 and 8,514.70 is: 12,776.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.46 : 31,489.14 = 8,514.70 : x
  2. Step 2: Convert to fraction form
    20,985.46/31,489.14 = 8,514.70/x
  3. Step 3: Cross multiply
    20,985.46x = 31,489.14 × 8,514.70
  4. Step 4: Simplify right side
    20,985.46x = 268,120,580.36
  5. Step 5: Solve for x
    x = 268,120,580.36/20,985.46
  6. Step 6: Final answer
    x = 12,776.49

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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.