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Finding the Fourth Proportional to 11,313.92, 15,612.12 and 6,278.12

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Solution

The fourth proportional to 11,313.92, 15,612.12 and 6,278.12 is: 8,663.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,313.92 : 15,612.12 = 6,278.12 : x
  2. Step 2: Convert to fraction form
    11,313.92/15,612.12 = 6,278.12/x
  3. Step 3: Cross multiply
    11,313.92x = 15,612.12 × 6,278.12
  4. Step 4: Simplify right side
    11,313.92x = 98,014,762.81
  5. Step 5: Solve for x
    x = 98,014,762.81/11,313.92
  6. Step 6: Final answer
    x = 8,663.20

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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.