Home / 31,146.81-42,982.89-16,999.66

Finding the Fourth Proportional to 31,146.81, 42,982.89 and 16,999.66

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Solution

The fourth proportional to 31,146.81, 42,982.89 and 16,999.66 is: 23,459.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,146.81 : 42,982.89 = 16,999.66 : x
  2. Step 2: Convert to fraction form
    31,146.81/42,982.89 = 16,999.66/x
  3. Step 3: Cross multiply
    31,146.81x = 42,982.89 × 16,999.66
  4. Step 4: Simplify right side
    31,146.81x = 730,694,515.82
  5. Step 5: Solve for x
    x = 730,694,515.82/31,146.81
  6. Step 6: Final answer
    x = 23,459.69

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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.