Home / 31,126.90-42,955.48-16,979.98

Finding the Fourth Proportional to 31,126.90, 42,955.48 and 16,979.98

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Solution

The fourth proportional to 31,126.90, 42,955.48 and 16,979.98 is: 23,432.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,126.90 : 42,955.48 = 16,979.98 : x
  2. Step 2: Convert to fraction form
    31,126.90/42,955.48 = 16,979.98/x
  3. Step 3: Cross multiply
    31,126.90x = 42,955.48 × 16,979.98
  4. Step 4: Simplify right side
    31,126.90x = 729,383,191.29
  5. Step 5: Solve for x
    x = 729,383,191.29/31,126.90
  6. Step 6: Final answer
    x = 23,432.57

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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.