Home / 20,867.19-31,259.04-12,542.68

Finding the Fourth Proportional to 20,867.19, 31,259.04 and 12,542.68

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Solution

The fourth proportional to 20,867.19, 31,259.04 and 12,542.68 is: 18,788.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.19 : 31,259.04 = 12,542.68 : x
  2. Step 2: Convert to fraction form
    20,867.19/31,259.04 = 12,542.68/x
  3. Step 3: Cross multiply
    20,867.19x = 31,259.04 × 12,542.68
  4. Step 4: Simplify right side
    20,867.19x = 392,072,135.83
  5. Step 5: Solve for x
    x = 392,072,135.83/20,867.19
  6. Step 6: Final answer
    x = 18,788.93

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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.