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Finding the Fourth Proportional to 18,886.96, 28,334.18 and 10,578.76

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Solution

The fourth proportional to 18,886.96, 28,334.18 and 10,578.76 is: 15,870.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,886.96 : 28,334.18 = 10,578.76 : x
  2. Step 2: Convert to fraction form
    18,886.96/28,334.18 = 10,578.76/x
  3. Step 3: Cross multiply
    18,886.96x = 28,334.18 × 10,578.76
  4. Step 4: Simplify right side
    18,886.96x = 299,740,490.02
  5. Step 5: Solve for x
    x = 299,740,490.02/18,886.96
  6. Step 6: Final answer
    x = 15,870.23

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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.