Home / 28,715.76-43,076.16-9,992.88

Finding the Fourth Proportional to 28,715.76, 43,076.16 and 9,992.88

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Solution

The fourth proportional to 28,715.76, 43,076.16 and 9,992.88 is: 14,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.76 : 43,076.16 = 9,992.88 : x
  2. Step 2: Convert to fraction form
    28,715.76/43,076.16 = 9,992.88/x
  3. Step 3: Cross multiply
    28,715.76x = 43,076.16 × 9,992.88
  4. Step 4: Simplify right side
    28,715.76x = 430,454,897.74
  5. Step 5: Solve for x
    x = 430,454,897.74/28,715.76
  6. Step 6: Final answer
    x = 14,990.20

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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.