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Finding the Fourth Proportional to 11,313, 15,612.12 and 6,345

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Solution

The fourth proportional to 11,313, 15,612.12 and 6,345 is: 8,756.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,313 : 15,612.12 = 6,345 : x
  2. Step 2: Convert to fraction form
    11,313/15,612.12 = 6,345/x
  3. Step 3: Cross multiply
    11,313x = 15,612.12 × 6,345
  4. Step 4: Simplify right side
    11,313x = 99,058,901.40
  5. Step 5: Solve for x
    x = 99,058,901.40/11,313
  6. Step 6: Final answer
    x = 8,756.20

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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.