Home / 15,884.20-21,920.58-8,810.92

Finding the Fourth Proportional to 15,884.20, 21,920.58 and 8,810.92

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Solution

The fourth proportional to 15,884.20, 21,920.58 and 8,810.92 is: 12,159.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,884.20 : 21,920.58 = 8,810.92 : x
  2. Step 2: Convert to fraction form
    15,884.20/21,920.58 = 8,810.92/x
  3. Step 3: Cross multiply
    15,884.20x = 21,920.58 × 8,810.92
  4. Step 4: Simplify right side
    15,884.20x = 193,140,476.73
  5. Step 5: Solve for x
    x = 193,140,476.73/15,884.20
  6. Step 6: Final answer
    x = 12,159.28

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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.