Home / 13,711.28-18,921.93-7,743.08

Finding the Fourth Proportional to 13,711.28, 18,921.93 and 7,743.08

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Solution

The fourth proportional to 13,711.28, 18,921.93 and 7,743.08 is: 10,685.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.28 : 18,921.93 = 7,743.08 : x
  2. Step 2: Convert to fraction form
    13,711.28/18,921.93 = 7,743.08/x
  3. Step 3: Cross multiply
    13,711.28x = 18,921.93 × 7,743.08
  4. Step 4: Simplify right side
    13,711.28x = 146,514,017.74
  5. Step 5: Solve for x
    x = 146,514,017.74/13,711.28
  6. Step 6: Final answer
    x = 10,685.66

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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.