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Finding the Fourth Proportional to 18,878.45, 28,294.10 and 9,995.82

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Solution

The fourth proportional to 18,878.45, 28,294.10 and 9,995.82 is: 14,981.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.45 : 28,294.10 = 9,995.82 : x
  2. Step 2: Convert to fraction form
    18,878.45/28,294.10 = 9,995.82/x
  3. Step 3: Cross multiply
    18,878.45x = 28,294.10 × 9,995.82
  4. Step 4: Simplify right side
    18,878.45x = 282,822,730.66
  5. Step 5: Solve for x
    x = 282,822,730.66/18,878.45
  6. Step 6: Final answer
    x = 14,981.25

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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.