Home / 10,056.60-15,072.30-5,128.20

Finding the Fourth Proportional to 10,056.60, 15,072.30 and 5,128.20

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Solution

The fourth proportional to 10,056.60, 15,072.30 and 5,128.20 is: 7,685.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,056.60 : 15,072.30 = 5,128.20 : x
  2. Step 2: Convert to fraction form
    10,056.60/15,072.30 = 5,128.20/x
  3. Step 3: Cross multiply
    10,056.60x = 15,072.30 × 5,128.20
  4. Step 4: Simplify right side
    10,056.60x = 77,293,768.86
  5. Step 5: Solve for x
    x = 77,293,768.86/10,056.60
  6. Step 6: Final answer
    x = 7,685.87

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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.