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Finding the Fourth Proportional to 15,868.38, 21,897.50 and 8,794.38

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Solution

The fourth proportional to 15,868.38, 21,897.50 and 8,794.38 is: 12,135.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868.38 : 21,897.50 = 8,794.38 : x
  2. Step 2: Convert to fraction form
    15,868.38/21,897.50 = 8,794.38/x
  3. Step 3: Cross multiply
    15,868.38x = 21,897.50 × 8,794.38
  4. Step 4: Simplify right side
    15,868.38x = 192,574,892.08
  5. Step 5: Solve for x
    x = 192,574,892.08/15,868.38
  6. Step 6: Final answer
    x = 12,135.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.