Home / 13,215.29-18,237.15-7,247.48

Finding the Fourth Proportional to 13,215.29, 18,237.15 and 7,247.48

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Solution

The fourth proportional to 13,215.29, 18,237.15 and 7,247.48 is: 10,001.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.29 : 18,237.15 = 7,247.48 : x
  2. Step 2: Convert to fraction form
    13,215.29/18,237.15 = 7,247.48/x
  3. Step 3: Cross multiply
    13,215.29x = 18,237.15 × 7,247.48
  4. Step 4: Simplify right side
    13,215.29x = 132,173,288.70
  5. Step 5: Solve for x
    x = 132,173,288.70/13,215.29
  6. Step 6: Final answer
    x = 10,001.55

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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.