Home / 20,917.78-31,192.15-18,014.74

Finding the Fourth Proportional to 20,917.78, 31,192.15 and 18,014.74

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Solution

The fourth proportional to 20,917.78, 31,192.15 and 18,014.74 is: 26,863.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.78 : 31,192.15 = 18,014.74 : x
  2. Step 2: Convert to fraction form
    20,917.78/31,192.15 = 18,014.74/x
  3. Step 3: Cross multiply
    20,917.78x = 31,192.15 × 18,014.74
  4. Step 4: Simplify right side
    20,917.78x = 561,918,472.29
  5. Step 5: Solve for x
    x = 561,918,472.29/20,917.78
  6. Step 6: Final answer
    x = 26,863.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.