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Finding the Fourth Proportional to 9,889.88, 13,652.97 and 5,697.32

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Solution

The fourth proportional to 9,889.88, 13,652.97 and 5,697.32 is: 7,865.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,889.88 : 13,652.97 = 5,697.32 : x
  2. Step 2: Convert to fraction form
    9,889.88/13,652.97 = 5,697.32/x
  3. Step 3: Cross multiply
    9,889.88x = 13,652.97 × 5,697.32
  4. Step 4: Simplify right side
    9,889.88x = 77,785,339.04
  5. Step 5: Solve for x
    x = 77,785,339.04/9,889.88
  6. Step 6: Final answer
    x = 7,865.14

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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.