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Finding the Fourth Proportional to 25,600.79, 38,407.65 and 7,132.79

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Solution

The fourth proportional to 25,600.79, 38,407.65 and 7,132.79 is: 10,700.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,600.79 : 38,407.65 = 7,132.79 : x
  2. Step 2: Convert to fraction form
    25,600.79/38,407.65 = 7,132.79/x
  3. Step 3: Cross multiply
    25,600.79x = 38,407.65 × 7,132.79
  4. Step 4: Simplify right side
    25,600.79x = 273,953,509.81
  5. Step 5: Solve for x
    x = 273,953,509.81/25,600.79
  6. Step 6: Final answer
    x = 10,700.98

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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.