Home / 15,930.48-21,984.56-8,857.20

Finding the Fourth Proportional to 15,930.48, 21,984.56 and 8,857.20

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Solution

The fourth proportional to 15,930.48, 21,984.56 and 8,857.20 is: 12,223.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,930.48 : 21,984.56 = 8,857.20 : x
  2. Step 2: Convert to fraction form
    15,930.48/21,984.56 = 8,857.20/x
  3. Step 3: Cross multiply
    15,930.48x = 21,984.56 × 8,857.20
  4. Step 4: Simplify right side
    15,930.48x = 194,721,644.83
  5. Step 5: Solve for x
    x = 194,721,644.83/15,930.48
  6. Step 6: Final answer
    x = 12,223.21

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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.