Home / 20,394.61-28,154.45-13,677.78

Finding the Fourth Proportional to 20,394.61, 28,154.45 and 13,677.78

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Solution

The fourth proportional to 20,394.61, 28,154.45 and 13,677.78 is: 18,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.61 : 28,154.45 = 13,677.78 : x
  2. Step 2: Convert to fraction form
    20,394.61/28,154.45 = 13,677.78/x
  3. Step 3: Cross multiply
    20,394.61x = 28,154.45 × 13,677.78
  4. Step 4: Simplify right side
    20,394.61x = 385,090,373.12
  5. Step 5: Solve for x
    x = 385,090,373.12/20,394.61
  6. Step 6: Final answer
    x = 18,881.97

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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.