Home / 15,500.80-21,387.58-8,784.89

Finding the Fourth Proportional to 15,500.80, 21,387.58 and 8,784.89

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Solution

The fourth proportional to 15,500.80, 21,387.58 and 8,784.89 is: 12,121.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.80 : 21,387.58 = 8,784.89 : x
  2. Step 2: Convert to fraction form
    15,500.80/21,387.58 = 8,784.89/x
  3. Step 3: Cross multiply
    15,500.80x = 21,387.58 × 8,784.89
  4. Step 4: Simplify right side
    15,500.80x = 187,887,537.67
  5. Step 5: Solve for x
    x = 187,887,537.67/15,500.80
  6. Step 6: Final answer
    x = 12,121.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.