Home / 11,097.20-15,309-6,378.75

Finding the Fourth Proportional to 11,097.20, 15,309 and 6,378.75

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Solution

The fourth proportional to 11,097.20, 15,309 and 6,378.75 is: 8,799.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,097.20 : 15,309 = 6,378.75 : x
  2. Step 2: Convert to fraction form
    11,097.20/15,309 = 6,378.75/x
  3. Step 3: Cross multiply
    11,097.20x = 15,309 × 6,378.75
  4. Step 4: Simplify right side
    11,097.20x = 97,652,283.75
  5. Step 5: Solve for x
    x = 97,652,283.75/11,097.20
  6. Step 6: Final answer
    x = 8,799.72

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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.