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Finding the Fourth Proportional to 15,145.87, 20,902.29 and 10,106.89

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Solution

The fourth proportional to 15,145.87, 20,902.29 and 10,106.89 is: 13,948.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.87 : 20,902.29 = 10,106.89 : x
  2. Step 2: Convert to fraction form
    15,145.87/20,902.29 = 10,106.89/x
  3. Step 3: Cross multiply
    15,145.87x = 20,902.29 × 10,106.89
  4. Step 4: Simplify right side
    15,145.87x = 211,257,145.78
  5. Step 5: Solve for x
    x = 211,257,145.78/15,145.87
  6. Step 6: Final answer
    x = 13,948.17

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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.