Home / 15,474.36-21,354.12-8,400.72

Finding the Fourth Proportional to 15,474.36, 21,354.12 and 8,400.72

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Solution

The fourth proportional to 15,474.36, 21,354.12 and 8,400.72 is: 11,592.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,474.36 : 21,354.12 = 8,400.72 : x
  2. Step 2: Convert to fraction form
    15,474.36/21,354.12 = 8,400.72/x
  3. Step 3: Cross multiply
    15,474.36x = 21,354.12 × 8,400.72
  4. Step 4: Simplify right side
    15,474.36x = 179,389,982.97
  5. Step 5: Solve for x
    x = 179,389,982.97/15,474.36
  6. Step 6: Final answer
    x = 11,592.72

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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.