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Finding the Fourth Proportional to 38,643.86, 57,974.02 and 13,345.76

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Solution

The fourth proportional to 38,643.86, 57,974.02 and 13,345.76 is: 20,021.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,643.86 : 57,974.02 = 13,345.76 : x
  2. Step 2: Convert to fraction form
    38,643.86/57,974.02 = 13,345.76/x
  3. Step 3: Cross multiply
    38,643.86x = 57,974.02 × 13,345.76
  4. Step 4: Simplify right side
    38,643.86x = 773,707,357.16
  5. Step 5: Solve for x
    x = 773,707,357.16/38,643.86
  6. Step 6: Final answer
    x = 20,021.48

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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.