Home / 15,815.70-21,827.86-9,101.20

Finding the Fourth Proportional to 15,815.70, 21,827.86 and 9,101.20

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Solution

The fourth proportional to 15,815.70, 21,827.86 and 9,101.20 is: 12,560.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,815.70 : 21,827.86 = 9,101.20 : x
  2. Step 2: Convert to fraction form
    15,815.70/21,827.86 = 9,101.20/x
  3. Step 3: Cross multiply
    15,815.70x = 21,827.86 × 9,101.20
  4. Step 4: Simplify right side
    15,815.70x = 198,659,719.43
  5. Step 5: Solve for x
    x = 198,659,719.43/15,815.70
  6. Step 6: Final answer
    x = 12,560.92

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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.