Home / 31,135.12-42,966.72-16,988.20

Finding the Fourth Proportional to 31,135.12, 42,966.72 and 16,988.20

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Solution

The fourth proportional to 31,135.12, 42,966.72 and 16,988.20 is: 23,443.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,135.12 : 42,966.72 = 16,988.20 : x
  2. Step 2: Convert to fraction form
    31,135.12/42,966.72 = 16,988.20/x
  3. Step 3: Cross multiply
    31,135.12x = 42,966.72 × 16,988.20
  4. Step 4: Simplify right side
    31,135.12x = 729,927,232.70
  5. Step 5: Solve for x
    x = 729,927,232.70/31,135.12
  6. Step 6: Final answer
    x = 23,443.85

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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.