Home / 28,037.05-38,691.01-15,290.20

Finding the Fourth Proportional to 28,037.05, 38,691.01 and 15,290.20

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Solution

The fourth proportional to 28,037.05, 38,691.01 and 15,290.20 is: 21,100.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,037.05 : 38,691.01 = 15,290.20 : x
  2. Step 2: Convert to fraction form
    28,037.05/38,691.01 = 15,290.20/x
  3. Step 3: Cross multiply
    28,037.05x = 38,691.01 × 15,290.20
  4. Step 4: Simplify right side
    28,037.05x = 591,593,184.37
  5. Step 5: Solve for x
    x = 591,593,184.37/28,037.05
  6. Step 6: Final answer
    x = 21,100.41

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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.