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Finding the Fourth Proportional to 18,988.28, 28,479.18 and 7,295.48

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Solution

The fourth proportional to 18,988.28, 28,479.18 and 7,295.48 is: 10,941.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.28 : 28,479.18 = 7,295.48 : x
  2. Step 2: Convert to fraction form
    18,988.28/28,479.18 = 7,295.48/x
  3. Step 3: Cross multiply
    18,988.28x = 28,479.18 × 7,295.48
  4. Step 4: Simplify right side
    18,988.28x = 207,769,288.11
  5. Step 5: Solve for x
    x = 207,769,288.11/18,988.28
  6. Step 6: Final answer
    x = 10,941.98

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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.