Home / 28,195.68-38,910.72-15,621.12

Finding the Fourth Proportional to 28,195.68, 38,910.72 and 15,621.12

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Solution

The fourth proportional to 28,195.68, 38,910.72 and 15,621.12 is: 21,557.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,195.68 : 38,910.72 = 15,621.12 : x
  2. Step 2: Convert to fraction form
    28,195.68/38,910.72 = 15,621.12/x
  3. Step 3: Cross multiply
    28,195.68x = 38,910.72 × 15,621.12
  4. Step 4: Simplify right side
    28,195.68x = 607,829,026.41
  5. Step 5: Solve for x
    x = 607,829,026.41/28,195.68
  6. Step 6: Final answer
    x = 21,557.52

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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.