Home / 13,386.12-18,472.80-7,418.20

Finding the Fourth Proportional to 13,386.12, 18,472.80 and 7,418.20

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Solution

The fourth proportional to 13,386.12, 18,472.80 and 7,418.20 is: 10,237.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.12 : 18,472.80 = 7,418.20 : x
  2. Step 2: Convert to fraction form
    13,386.12/18,472.80 = 7,418.20/x
  3. Step 3: Cross multiply
    13,386.12x = 18,472.80 × 7,418.20
  4. Step 4: Simplify right side
    13,386.12x = 137,034,924.96
  5. Step 5: Solve for x
    x = 137,034,924.96/13,386.12
  6. Step 6: Final answer
    x = 10,237.09

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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.