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Finding the Fourth Proportional to 18,818.47, 25,965.33 and 10,859.01

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Solution

The fourth proportional to 18,818.47, 25,965.33 and 10,859.01 is: 14,983.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.47 : 25,965.33 = 10,859.01 : x
  2. Step 2: Convert to fraction form
    18,818.47/25,965.33 = 10,859.01/x
  3. Step 3: Cross multiply
    18,818.47x = 25,965.33 × 10,859.01
  4. Step 4: Simplify right side
    18,818.47x = 281,957,778.12
  5. Step 5: Solve for x
    x = 281,957,778.12/18,818.47
  6. Step 6: Final answer
    x = 14,983.03

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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.