Home / 13,605.26-20,402.40-4,719.20

Finding the Fourth Proportional to 13,605.26, 20,402.40 and 4,719.20

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Solution

The fourth proportional to 13,605.26, 20,402.40 and 4,719.20 is: 7,076.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.26 : 20,402.40 = 4,719.20 : x
  2. Step 2: Convert to fraction form
    13,605.26/20,402.40 = 4,719.20/x
  3. Step 3: Cross multiply
    13,605.26x = 20,402.40 × 4,719.20
  4. Step 4: Simplify right side
    13,605.26x = 96,282,904.07
  5. Step 5: Solve for x
    x = 96,282,904.07/13,605.26
  6. Step 6: Final answer
    x = 7,076.89

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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.