Home / 31,126.50-42,954.57-16,979.40

Finding the Fourth Proportional to 31,126.50, 42,954.57 and 16,979.40

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Solution

The fourth proportional to 31,126.50, 42,954.57 and 16,979.40 is: 23,431.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,126.50 : 42,954.57 = 16,979.40 : x
  2. Step 2: Convert to fraction form
    31,126.50/42,954.57 = 16,979.40/x
  3. Step 3: Cross multiply
    31,126.50x = 42,954.57 × 16,979.40
  4. Step 4: Simplify right side
    31,126.50x = 729,342,825.86
  5. Step 5: Solve for x
    x = 729,342,825.86/31,126.50
  6. Step 6: Final answer
    x = 23,431.57

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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.