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Finding the Fourth Proportional to 11,355.32, 15,669.11 and 6,319.15

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Solution

The fourth proportional to 11,355.32, 15,669.11 and 6,319.15 is: 8,719.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.32 : 15,669.11 = 6,319.15 : x
  2. Step 2: Convert to fraction form
    11,355.32/15,669.11 = 6,319.15/x
  3. Step 3: Cross multiply
    11,355.32x = 15,669.11 × 6,319.15
  4. Step 4: Simplify right side
    11,355.32x = 99,015,433.08
  5. Step 5: Solve for x
    x = 99,015,433.08/11,355.32
  6. Step 6: Final answer
    x = 8,719.74

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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.