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Finding the Fourth Proportional to 10,874.21, 15,002.79 and 7,515.81

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Solution

The fourth proportional to 10,874.21, 15,002.79 and 7,515.81 is: 10,369.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,874.21 : 15,002.79 = 7,515.81 : x
  2. Step 2: Convert to fraction form
    10,874.21/15,002.79 = 7,515.81/x
  3. Step 3: Cross multiply
    10,874.21x = 15,002.79 × 7,515.81
  4. Step 4: Simplify right side
    10,874.21x = 112,758,119.11
  5. Step 5: Solve for x
    x = 112,758,119.11/10,874.21
  6. Step 6: Final answer
    x = 10,369.32

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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.