Home / 11,117.40-15,342.24-6,643.72

Finding the Fourth Proportional to 11,117.40, 15,342.24 and 6,643.72

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Solution

The fourth proportional to 11,117.40, 15,342.24 and 6,643.72 is: 9,168.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,117.40 : 15,342.24 = 6,643.72 : x
  2. Step 2: Convert to fraction form
    11,117.40/15,342.24 = 6,643.72/x
  3. Step 3: Cross multiply
    11,117.40x = 15,342.24 × 6,643.72
  4. Step 4: Simplify right side
    11,117.40x = 101,929,546.73
  5. Step 5: Solve for x
    x = 101,929,546.73/11,117.40
  6. Step 6: Final answer
    x = 9,168.47

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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.