Home / 21,267.15-31,877.23-8,780.29

Finding the Fourth Proportional to 21,267.15, 31,877.23 and 8,780.29

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Solution

The fourth proportional to 21,267.15, 31,877.23 and 8,780.29 is: 13,160.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,267.15 : 31,877.23 = 8,780.29 : x
  2. Step 2: Convert to fraction form
    21,267.15/31,877.23 = 8,780.29/x
  3. Step 3: Cross multiply
    21,267.15x = 31,877.23 × 8,780.29
  4. Step 4: Simplify right side
    21,267.15x = 279,891,120.51
  5. Step 5: Solve for x
    x = 279,891,120.51/21,267.15
  6. Step 6: Final answer
    x = 13,160.73

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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.