Home / 31,125.28-42,952.92-16,978.36

Finding the Fourth Proportional to 31,125.28, 42,952.92 and 16,978.36

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Solution

The fourth proportional to 31,125.28, 42,952.92 and 16,978.36 is: 23,430.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,125.28 : 42,952.92 = 16,978.36 : x
  2. Step 2: Convert to fraction form
    31,125.28/42,952.92 = 16,978.36/x
  3. Step 3: Cross multiply
    31,125.28x = 42,952.92 × 16,978.36
  4. Step 4: Simplify right side
    31,125.28x = 729,270,138.81
  5. Step 5: Solve for x
    x = 729,270,138.81/31,125.28
  6. Step 6: Final answer
    x = 23,430.16

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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.