Home / 31,132.12-42,962.58-16,985.20

Finding the Fourth Proportional to 31,132.12, 42,962.58 and 16,985.20

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Solution

The fourth proportional to 31,132.12, 42,962.58 and 16,985.20 is: 23,439.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,132.12 : 42,962.58 = 16,985.20 : x
  2. Step 2: Convert to fraction form
    31,132.12/42,962.58 = 16,985.20/x
  3. Step 3: Cross multiply
    31,132.12x = 42,962.58 × 16,985.20
  4. Step 4: Simplify right side
    31,132.12x = 729,728,013.82
  5. Step 5: Solve for x
    x = 729,728,013.82/31,132.12
  6. Step 6: Final answer
    x = 23,439.71

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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.