Home / 10,256.16-15,379.38-5,320.86

Finding the Fourth Proportional to 10,256.16, 15,379.38 and 5,320.86

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Solution

The fourth proportional to 10,256.16, 15,379.38 and 5,320.86 is: 7,978.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,256.16 : 15,379.38 = 5,320.86 : x
  2. Step 2: Convert to fraction form
    10,256.16/15,379.38 = 5,320.86/x
  3. Step 3: Cross multiply
    10,256.16x = 15,379.38 × 5,320.86
  4. Step 4: Simplify right side
    10,256.16x = 81,831,527.87
  5. Step 5: Solve for x
    x = 81,831,527.87/10,256.16
  6. Step 6: Final answer
    x = 7,978.77

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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.