Home / 20,757.90-31,060.08-12,443.70

Finding the Fourth Proportional to 20,757.90, 31,060.08 and 12,443.70

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Solution

The fourth proportional to 20,757.90, 31,060.08 and 12,443.70 is: 18,619.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.90 : 31,060.08 = 12,443.70 : x
  2. Step 2: Convert to fraction form
    20,757.90/31,060.08 = 12,443.70/x
  3. Step 3: Cross multiply
    20,757.90x = 31,060.08 × 12,443.70
  4. Step 4: Simplify right side
    20,757.90x = 386,502,317.50
  5. Step 5: Solve for x
    x = 386,502,317.50/20,757.90
  6. Step 6: Final answer
    x = 18,619.53

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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.