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Finding the Fourth Proportional to 38,393.76, 57,579.42 and 13,429.20

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Solution

The fourth proportional to 38,393.76, 57,579.42 and 13,429.20 is: 20,139.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,393.76 : 57,579.42 = 13,429.20 : x
  2. Step 2: Convert to fraction form
    38,393.76/57,579.42 = 13,429.20/x
  3. Step 3: Cross multiply
    38,393.76x = 57,579.42 × 13,429.20
  4. Step 4: Simplify right side
    38,393.76x = 773,245,547.06
  5. Step 5: Solve for x
    x = 773,245,547.06/38,393.76
  6. Step 6: Final answer
    x = 20,139.88

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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.