Home / 15,605.38-21,539.70-8,894.54

Finding the Fourth Proportional to 15,605.38, 21,539.70 and 8,894.54

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Solution

The fourth proportional to 15,605.38, 21,539.70 and 8,894.54 is: 12,276.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.38 : 21,539.70 = 8,894.54 : x
  2. Step 2: Convert to fraction form
    15,605.38/21,539.70 = 8,894.54/x
  3. Step 3: Cross multiply
    15,605.38x = 21,539.70 × 8,894.54
  4. Step 4: Simplify right side
    15,605.38x = 191,585,723.24
  5. Step 5: Solve for x
    x = 191,585,723.24/15,605.38
  6. Step 6: Final answer
    x = 12,276.90

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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.