Home / 25,456.80-38,190.60-7,688.10

Finding the Fourth Proportional to 25,456.80, 38,190.60 and 7,688.10

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Solution

The fourth proportional to 25,456.80, 38,190.60 and 7,688.10 is: 11,533.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,456.80 : 38,190.60 = 7,688.10 : x
  2. Step 2: Convert to fraction form
    25,456.80/38,190.60 = 7,688.10/x
  3. Step 3: Cross multiply
    25,456.80x = 38,190.60 × 7,688.10
  4. Step 4: Simplify right side
    25,456.80x = 293,613,151.86
  5. Step 5: Solve for x
    x = 293,613,151.86/25,456.80
  6. Step 6: Final answer
    x = 11,533.78

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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.