Home / 10,129.68-15,199.85-5,199.32

Finding the Fourth Proportional to 10,129.68, 15,199.85 and 5,199.32

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Solution

The fourth proportional to 10,129.68, 15,199.85 and 5,199.32 is: 7,801.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.68 : 15,199.85 = 5,199.32 : x
  2. Step 2: Convert to fraction form
    10,129.68/15,199.85 = 5,199.32/x
  3. Step 3: Cross multiply
    10,129.68x = 15,199.85 × 5,199.32
  4. Step 4: Simplify right side
    10,129.68x = 79,028,935.10
  5. Step 5: Solve for x
    x = 79,028,935.10/10,129.68
  6. Step 6: Final answer
    x = 7,801.72

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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.