Home / 31,135.20-42,967.20-16,988.64

Finding the Fourth Proportional to 31,135.20, 42,967.20 and 16,988.64

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Solution

The fourth proportional to 31,135.20, 42,967.20 and 16,988.64 is: 23,444.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,135.20 : 42,967.20 = 16,988.64 : x
  2. Step 2: Convert to fraction form
    31,135.20/42,967.20 = 16,988.64/x
  3. Step 3: Cross multiply
    31,135.20x = 42,967.20 × 16,988.64
  4. Step 4: Simplify right side
    31,135.20x = 729,954,292.61
  5. Step 5: Solve for x
    x = 729,954,292.61/31,135.20
  6. Step 6: Final answer
    x = 23,444.66

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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.