Home / 39,091.76-58,646.40-12,439.28

Finding the Fourth Proportional to 39,091.76, 58,646.40 and 12,439.28

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Solution

The fourth proportional to 39,091.76, 58,646.40 and 12,439.28 is: 18,661.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,091.76 : 58,646.40 = 12,439.28 : x
  2. Step 2: Convert to fraction form
    39,091.76/58,646.40 = 12,439.28/x
  3. Step 3: Cross multiply
    39,091.76x = 58,646.40 × 12,439.28
  4. Step 4: Simplify right side
    39,091.76x = 729,518,990.59
  5. Step 5: Solve for x
    x = 729,518,990.59/39,091.76
  6. Step 6: Final answer
    x = 18,661.71

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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.