Home / 13,387.59-18,474.57-7,722.36

Finding the Fourth Proportional to 13,387.59, 18,474.57 and 7,722.36

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Solution

The fourth proportional to 13,387.59, 18,474.57 and 7,722.36 is: 10,656.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.59 : 18,474.57 = 7,722.36 : x
  2. Step 2: Convert to fraction form
    13,387.59/18,474.57 = 7,722.36/x
  3. Step 3: Cross multiply
    13,387.59x = 18,474.57 × 7,722.36
  4. Step 4: Simplify right side
    13,387.59x = 142,667,280.39
  5. Step 5: Solve for x
    x = 142,667,280.39/13,387.59
  6. Step 6: Final answer
    x = 10,656.68

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1.5x scale

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.