Home / 15,474.32-21,354.68-8,400.80

Finding the Fourth Proportional to 15,474.32, 21,354.68 and 8,400.80

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Solution

The fourth proportional to 15,474.32, 21,354.68 and 8,400.80 is: 11,593.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,474.32 : 21,354.68 = 8,400.80 : x
  2. Step 2: Convert to fraction form
    15,474.32/21,354.68 = 8,400.80/x
  3. Step 3: Cross multiply
    15,474.32x = 21,354.68 × 8,400.80
  4. Step 4: Simplify right side
    15,474.32x = 179,396,395.74
  5. Step 5: Solve for x
    x = 179,396,395.74/15,474.32
  6. Step 6: Final answer
    x = 11,593.17

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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.