Home / 18,915.70-28,365.34-6,432.38

Finding the Fourth Proportional to 18,915.70, 28,365.34 and 6,432.38

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Solution

The fourth proportional to 18,915.70, 28,365.34 and 6,432.38 is: 9,645.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.70 : 28,365.34 = 6,432.38 : x
  2. Step 2: Convert to fraction form
    18,915.70/28,365.34 = 6,432.38/x
  3. Step 3: Cross multiply
    18,915.70x = 28,365.34 × 6,432.38
  4. Step 4: Simplify right side
    18,915.70x = 182,456,645.71
  5. Step 5: Solve for x
    x = 182,456,645.71/18,915.70
  6. Step 6: Final answer
    x = 9,645.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.