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Finding the Fourth Proportional to 28,095.80, 42,159.90 and 10,578.20

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Solution

The fourth proportional to 28,095.80, 42,159.90 and 10,578.20 is: 15,873.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,095.80 : 42,159.90 = 10,578.20 : x
  2. Step 2: Convert to fraction form
    28,095.80/42,159.90 = 10,578.20/x
  3. Step 3: Cross multiply
    28,095.80x = 42,159.90 × 10,578.20
  4. Step 4: Simplify right side
    28,095.80x = 445,975,854.18
  5. Step 5: Solve for x
    x = 445,975,854.18/28,095.80
  6. Step 6: Final answer
    x = 15,873.40

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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.