Home / 38,930.76-58,412.88-12,643.56

Finding the Fourth Proportional to 38,930.76, 58,412.88 and 12,643.56

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Solution

The fourth proportional to 38,930.76, 58,412.88 and 12,643.56 is: 18,970.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,930.76 : 58,412.88 = 12,643.56 : x
  2. Step 2: Convert to fraction form
    38,930.76/58,412.88 = 12,643.56/x
  3. Step 3: Cross multiply
    38,930.76x = 58,412.88 × 12,643.56
  4. Step 4: Simplify right side
    38,930.76x = 738,546,753.05
  5. Step 5: Solve for x
    x = 738,546,753.05/38,930.76
  6. Step 6: Final answer
    x = 18,970.78

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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.