Home / 38,977.60-58,476-11,278.40

Finding the Fourth Proportional to 38,977.60, 58,476 and 11,278.40

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Solution

The fourth proportional to 38,977.60, 58,476 and 11,278.40 is: 16,920.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,977.60 : 58,476 = 11,278.40 : x
  2. Step 2: Convert to fraction form
    38,977.60/58,476 = 11,278.40/x
  3. Step 3: Cross multiply
    38,977.60x = 58,476 × 11,278.40
  4. Step 4: Simplify right side
    38,977.60x = 659,515,718.40
  5. Step 5: Solve for x
    x = 659,515,718.40/38,977.60
  6. Step 6: Final answer
    x = 16,920.38

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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.