Home / 31,137.65-42,970.10-16,990.80

Finding the Fourth Proportional to 31,137.65, 42,970.10 and 16,990.80

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Solution

The fourth proportional to 31,137.65, 42,970.10 and 16,990.80 is: 23,447.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,137.65 : 42,970.10 = 16,990.80 : x
  2. Step 2: Convert to fraction form
    31,137.65/42,970.10 = 16,990.80/x
  3. Step 3: Cross multiply
    31,137.65x = 42,970.10 × 16,990.80
  4. Step 4: Simplify right side
    31,137.65x = 730,096,290.13
  5. Step 5: Solve for x
    x = 730,096,290.13/31,137.65
  6. Step 6: Final answer
    x = 23,447.38

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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.