Home / 15,824.87-21,840.38-9,110.78

Finding the Fourth Proportional to 15,824.87, 21,840.38 and 9,110.78

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Solution

The fourth proportional to 15,824.87, 21,840.38 and 9,110.78 is: 12,574.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,824.87 : 21,840.38 = 9,110.78 : x
  2. Step 2: Convert to fraction form
    15,824.87/21,840.38 = 9,110.78/x
  3. Step 3: Cross multiply
    15,824.87x = 21,840.38 × 9,110.78
  4. Step 4: Simplify right side
    15,824.87x = 198,982,909.86
  5. Step 5: Solve for x
    x = 198,982,909.86/15,824.87
  6. Step 6: Final answer
    x = 12,574.06

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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.