Home / 31,137.68-42,970.48-16,990.52

Finding the Fourth Proportional to 31,137.68, 42,970.48 and 16,990.52

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Solution

The fourth proportional to 31,137.68, 42,970.48 and 16,990.52 is: 23,447.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,137.68 : 42,970.48 = 16,990.52 : x
  2. Step 2: Convert to fraction form
    31,137.68/42,970.48 = 16,990.52/x
  3. Step 3: Cross multiply
    31,137.68x = 42,970.48 × 16,990.52
  4. Step 4: Simplify right side
    31,137.68x = 730,090,799.85
  5. Step 5: Solve for x
    x = 730,090,799.85/31,137.68
  6. Step 6: Final answer
    x = 23,447.18

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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.