Home / 11,282.16-15,530.40-9,781.20

Finding the Fourth Proportional to 11,282.16, 15,530.40 and 9,781.20

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Solution

The fourth proportional to 11,282.16, 15,530.40 and 9,781.20 is: 13,464.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,282.16 : 15,530.40 = 9,781.20 : x
  2. Step 2: Convert to fraction form
    11,282.16/15,530.40 = 9,781.20/x
  3. Step 3: Cross multiply
    11,282.16x = 15,530.40 × 9,781.20
  4. Step 4: Simplify right side
    11,282.16x = 151,905,948.48
  5. Step 5: Solve for x
    x = 151,905,948.48/11,282.16
  6. Step 6: Final answer
    x = 13,464.26

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Why These Related Problems?

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