Home / 15,380.16-21,222.88-8,665.28

Finding the Fourth Proportional to 15,380.16, 21,222.88 and 8,665.28

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Solution

The fourth proportional to 15,380.16, 21,222.88 and 8,665.28 is: 11,957.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,380.16 : 21,222.88 = 8,665.28 : x
  2. Step 2: Convert to fraction form
    15,380.16/21,222.88 = 8,665.28/x
  3. Step 3: Cross multiply
    15,380.16x = 21,222.88 × 8,665.28
  4. Step 4: Simplify right side
    15,380.16x = 183,902,197.61
  5. Step 5: Solve for x
    x = 183,902,197.61/15,380.16
  6. Step 6: Final answer
    x = 11,957.11

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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.