Home / 21,170.08-31,686.36-15,621.13

Finding the Fourth Proportional to 21,170.08, 31,686.36 and 15,621.13

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Solution

The fourth proportional to 21,170.08, 31,686.36 and 15,621.13 is: 23,380.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.08 : 31,686.36 = 15,621.13 : x
  2. Step 2: Convert to fraction form
    21,170.08/31,686.36 = 15,621.13/x
  3. Step 3: Cross multiply
    21,170.08x = 31,686.36 × 15,621.13
  4. Step 4: Simplify right side
    21,170.08x = 494,976,748.79
  5. Step 5: Solve for x
    x = 494,976,748.79/21,170.08
  6. Step 6: Final answer
    x = 23,380.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.