Home / 20,840.12-31,250.71-8,988.29

Finding the Fourth Proportional to 20,840.12, 31,250.71 and 8,988.29

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Solution

The fourth proportional to 20,840.12, 31,250.71 and 8,988.29 is: 13,478.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.12 : 31,250.71 = 8,988.29 : x
  2. Step 2: Convert to fraction form
    20,840.12/31,250.71 = 8,988.29/x
  3. Step 3: Cross multiply
    20,840.12x = 31,250.71 × 8,988.29
  4. Step 4: Simplify right side
    20,840.12x = 280,890,265.46
  5. Step 5: Solve for x
    x = 280,890,265.46/20,840.12
  6. Step 6: Final answer
    x = 13,478.35

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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.