Home / 31,145.04-42,972.12-18,560.88

Finding the Fourth Proportional to 31,145.04, 42,972.12 and 18,560.88

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Solution

The fourth proportional to 31,145.04, 42,972.12 and 18,560.88 is: 25,609.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,145.04 : 42,972.12 = 18,560.88 : x
  2. Step 2: Convert to fraction form
    31,145.04/42,972.12 = 18,560.88/x
  3. Step 3: Cross multiply
    31,145.04x = 42,972.12 × 18,560.88
  4. Step 4: Simplify right side
    31,145.04x = 797,600,362.67
  5. Step 5: Solve for x
    x = 797,600,362.67/31,145.04
  6. Step 6: Final answer
    x = 25,609.23

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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.