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Finding the Fourth Proportional to 19,061.95, 28,578.50 and 8,519.20

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Solution

The fourth proportional to 19,061.95, 28,578.50 and 8,519.20 is: 12,772.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,061.95 : 28,578.50 = 8,519.20 : x
  2. Step 2: Convert to fraction form
    19,061.95/28,578.50 = 8,519.20/x
  3. Step 3: Cross multiply
    19,061.95x = 28,578.50 × 8,519.20
  4. Step 4: Simplify right side
    19,061.95x = 243,465,957.20
  5. Step 5: Solve for x
    x = 243,465,957.20/19,061.95
  6. Step 6: Final answer
    x = 12,772.35

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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.