Home / 31,133.68-42,964.32-16,987.12

Finding the Fourth Proportional to 31,133.68, 42,964.32 and 16,987.12

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Solution

The fourth proportional to 31,133.68, 42,964.32 and 16,987.12 is: 23,442.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,133.68 : 42,964.32 = 16,987.12 : x
  2. Step 2: Convert to fraction form
    31,133.68/42,964.32 = 16,987.12/x
  3. Step 3: Cross multiply
    31,133.68x = 42,964.32 × 16,987.12
  4. Step 4: Simplify right side
    31,133.68x = 729,840,059.56
  5. Step 5: Solve for x
    x = 729,840,059.56/31,133.68
  6. Step 6: Final answer
    x = 23,442.14

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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.