Home / 10,661.20-15,985.42-5,040.32

Finding the Fourth Proportional to 10,661.20, 15,985.42 and 5,040.32

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Solution

The fourth proportional to 10,661.20, 15,985.42 and 5,040.32 is: 7,557.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.20 : 15,985.42 = 5,040.32 : x
  2. Step 2: Convert to fraction form
    10,661.20/15,985.42 = 5,040.32/x
  3. Step 3: Cross multiply
    10,661.20x = 15,985.42 × 5,040.32
  4. Step 4: Simplify right side
    10,661.20x = 80,571,539.61
  5. Step 5: Solve for x
    x = 80,571,539.61/10,661.20
  6. Step 6: Final answer
    x = 7,557.46

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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.