Home / 39,820.47-59,739.35-12,117.75

Finding the Fourth Proportional to 39,820.47, 59,739.35 and 12,117.75

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Solution

The fourth proportional to 39,820.47, 59,739.35 and 12,117.75 is: 18,179.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,820.47 : 59,739.35 = 12,117.75 : x
  2. Step 2: Convert to fraction form
    39,820.47/59,739.35 = 12,117.75/x
  3. Step 3: Cross multiply
    39,820.47x = 59,739.35 × 12,117.75
  4. Step 4: Simplify right side
    39,820.47x = 723,906,508.46
  5. Step 5: Solve for x
    x = 723,906,508.46/39,820.47
  6. Step 6: Final answer
    x = 18,179.26

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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.