Home / 11,121.72-15,347.52-6,405.36

Finding the Fourth Proportional to 11,121.72, 15,347.52 and 6,405.36

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Solution

The fourth proportional to 11,121.72, 15,347.52 and 6,405.36 is: 8,839.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.72 : 15,347.52 = 6,405.36 : x
  2. Step 2: Convert to fraction form
    11,121.72/15,347.52 = 6,405.36/x
  3. Step 3: Cross multiply
    11,121.72x = 15,347.52 × 6,405.36
  4. Step 4: Simplify right side
    11,121.72x = 98,306,390.71
  5. Step 5: Solve for x
    x = 98,306,390.71/11,121.72
  6. Step 6: Final answer
    x = 8,839.14

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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.