Home / 31,135.92-42,965.28-16,988.44

Finding the Fourth Proportional to 31,135.92, 42,965.28 and 16,988.44

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Solution

The fourth proportional to 31,135.92, 42,965.28 and 16,988.44 is: 23,442.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,135.92 : 42,965.28 = 16,988.44 : x
  2. Step 2: Convert to fraction form
    31,135.92/42,965.28 = 16,988.44/x
  3. Step 3: Cross multiply
    31,135.92x = 42,965.28 × 16,988.44
  4. Step 4: Simplify right side
    31,135.92x = 729,913,081.36
  5. Step 5: Solve for x
    x = 729,913,081.36/31,135.92
  6. Step 6: Final answer
    x = 23,442.80

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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.