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Finding the Fourth Proportional to 18,895.47, 28,342.57 and 10,147.47

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Solution

The fourth proportional to 18,895.47, 28,342.57 and 10,147.47 is: 15,220.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,895.47 : 28,342.57 = 10,147.47 : x
  2. Step 2: Convert to fraction form
    18,895.47/28,342.57 = 10,147.47/x
  3. Step 3: Cross multiply
    18,895.47x = 28,342.57 × 10,147.47
  4. Step 4: Simplify right side
    18,895.47x = 287,605,328.06
  5. Step 5: Solve for x
    x = 287,605,328.06/18,895.47
  6. Step 6: Final answer
    x = 15,220.86

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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.