Home / 20,489.48-28,280.82-12,538.34

Finding the Fourth Proportional to 20,489.48, 28,280.82 and 12,538.34

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Solution

The fourth proportional to 20,489.48, 28,280.82 and 12,538.34 is: 17,306.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.48 : 28,280.82 = 12,538.34 : x
  2. Step 2: Convert to fraction form
    20,489.48/28,280.82 = 12,538.34/x
  3. Step 3: Cross multiply
    20,489.48x = 28,280.82 × 12,538.34
  4. Step 4: Simplify right side
    20,489.48x = 354,594,536.64
  5. Step 5: Solve for x
    x = 354,594,536.64/20,489.48
  6. Step 6: Final answer
    x = 17,306.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.