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Finding the Fourth Proportional to 11,395.52, 15,721.44 and 6,678.08

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Solution

The fourth proportional to 11,395.52, 15,721.44 and 6,678.08 is: 9,213.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,395.52 : 15,721.44 = 6,678.08 : x
  2. Step 2: Convert to fraction form
    11,395.52/15,721.44 = 6,678.08/x
  3. Step 3: Cross multiply
    11,395.52x = 15,721.44 × 6,678.08
  4. Step 4: Simplify right side
    11,395.52x = 104,989,034.04
  5. Step 5: Solve for x
    x = 104,989,034.04/11,395.52
  6. Step 6: Final answer
    x = 9,213.19

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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.