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Finding the Fourth Proportional to 18,702.47, 28,038.18 and 7,614.38

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Solution

The fourth proportional to 18,702.47, 28,038.18 and 7,614.38 is: 11,415.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.47 : 28,038.18 = 7,614.38 : x
  2. Step 2: Convert to fraction form
    18,702.47/28,038.18 = 7,614.38/x
  3. Step 3: Cross multiply
    18,702.47x = 28,038.18 × 7,614.38
  4. Step 4: Simplify right side
    18,702.47x = 213,493,357.03
  5. Step 5: Solve for x
    x = 213,493,357.03/18,702.47
  6. Step 6: Final answer
    x = 11,415.25

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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.