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Finding the Fourth Proportional to 28,170, 38,874.60 and 15,595.56

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Solution

The fourth proportional to 28,170, 38,874.60 and 15,595.56 is: 21,521.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,170 : 38,874.60 = 15,595.56 : x
  2. Step 2: Convert to fraction form
    28,170/38,874.60 = 15,595.56/x
  3. Step 3: Cross multiply
    28,170x = 38,874.60 × 15,595.56
  4. Step 4: Simplify right side
    28,170x = 606,271,156.78
  5. Step 5: Solve for x
    x = 606,271,156.78/28,170
  6. Step 6: Final answer
    x = 21,521.87

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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.