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Finding the Fourth Proportional to 15,405.16, 23,101.62 and 5,541.40

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Solution

The fourth proportional to 15,405.16, 23,101.62 and 5,541.40 is: 8,309.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.16 : 23,101.62 = 5,541.40 : x
  2. Step 2: Convert to fraction form
    15,405.16/23,101.62 = 5,541.40/x
  3. Step 3: Cross multiply
    15,405.16x = 23,101.62 × 5,541.40
  4. Step 4: Simplify right side
    15,405.16x = 128,015,317.07
  5. Step 5: Solve for x
    x = 128,015,317.07/15,405.16
  6. Step 6: Final answer
    x = 8,309.90

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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.