Home / 28,343.80-39,123.14-18,272.24

Finding the Fourth Proportional to 28,343.80, 39,123.14 and 18,272.24

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Solution

The fourth proportional to 28,343.80, 39,123.14 and 18,272.24 is: 25,221.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,343.80 : 39,123.14 = 18,272.24 : x
  2. Step 2: Convert to fraction form
    28,343.80/39,123.14 = 18,272.24/x
  3. Step 3: Cross multiply
    28,343.80x = 39,123.14 × 18,272.24
  4. Step 4: Simplify right side
    28,343.80x = 714,867,403.63
  5. Step 5: Solve for x
    x = 714,867,403.63/28,343.80
  6. Step 6: Final answer
    x = 25,221.30

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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.