Home / 20,851.71-31,267.85-12,089.13

Finding the Fourth Proportional to 20,851.71, 31,267.85 and 12,089.13

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Solution

The fourth proportional to 20,851.71, 31,267.85 and 12,089.13 is: 18,128.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.71 : 31,267.85 = 12,089.13 : x
  2. Step 2: Convert to fraction form
    20,851.71/31,267.85 = 12,089.13/x
  3. Step 3: Cross multiply
    20,851.71x = 31,267.85 × 12,089.13
  4. Step 4: Simplify right side
    20,851.71x = 378,001,043.02
  5. Step 5: Solve for x
    x = 378,001,043.02/20,851.71
  6. Step 6: Final answer
    x = 18,128.06

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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.