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Finding the Fourth Proportional to 11,453.76, 15,806.76 and 6,417.68

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Solution

The fourth proportional to 11,453.76, 15,806.76 and 6,417.68 is: 8,856.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,453.76 : 15,806.76 = 6,417.68 : x
  2. Step 2: Convert to fraction form
    11,453.76/15,806.76 = 6,417.68/x
  3. Step 3: Cross multiply
    11,453.76x = 15,806.76 × 6,417.68
  4. Step 4: Simplify right side
    11,453.76x = 101,442,727.52
  5. Step 5: Solve for x
    x = 101,442,727.52/11,453.76
  6. Step 6: Final answer
    x = 8,856.72

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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.