Home / 31,819.98-43,918.02-18,391.80

Finding the Fourth Proportional to 31,819.98, 43,918.02 and 18,391.80

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Solution

The fourth proportional to 31,819.98, 43,918.02 and 18,391.80 is: 25,384.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,819.98 : 43,918.02 = 18,391.80 : x
  2. Step 2: Convert to fraction form
    31,819.98/43,918.02 = 18,391.80/x
  3. Step 3: Cross multiply
    31,819.98x = 43,918.02 × 18,391.80
  4. Step 4: Simplify right side
    31,819.98x = 807,731,440.24
  5. Step 5: Solve for x
    x = 807,731,440.24/31,819.98
  6. Step 6: Final answer
    x = 25,384.41

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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.