Home / 10,143.20-13,985.88-7,442.12

Finding the Fourth Proportional to 10,143.20, 13,985.88 and 7,442.12

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Solution

The fourth proportional to 10,143.20, 13,985.88 and 7,442.12 is: 10,261.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,143.20 : 13,985.88 = 7,442.12 : x
  2. Step 2: Convert to fraction form
    10,143.20/13,985.88 = 7,442.12/x
  3. Step 3: Cross multiply
    10,143.20x = 13,985.88 × 7,442.12
  4. Step 4: Simplify right side
    10,143.20x = 104,084,597.27
  5. Step 5: Solve for x
    x = 104,084,597.27/10,143.20
  6. Step 6: Final answer
    x = 10,261.51

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.