Home / 20,398.96-28,148.88-14,434.12

Finding the Fourth Proportional to 20,398.96, 28,148.88 and 14,434.12

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Solution

The fourth proportional to 20,398.96, 28,148.88 and 14,434.12 is: 19,917.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.96 : 28,148.88 = 14,434.12 : x
  2. Step 2: Convert to fraction form
    20,398.96/28,148.88 = 14,434.12/x
  3. Step 3: Cross multiply
    20,398.96x = 28,148.88 × 14,434.12
  4. Step 4: Simplify right side
    20,398.96x = 406,304,311.79
  5. Step 5: Solve for x
    x = 406,304,311.79/20,398.96
  6. Step 6: Final answer
    x = 19,917.89

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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.