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Finding the Fourth Proportional to 9,988.56, 13,801.32 and 7,908.48

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Solution

The fourth proportional to 9,988.56, 13,801.32 and 7,908.48 is: 10,927.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.56 : 13,801.32 = 7,908.48 : x
  2. Step 2: Convert to fraction form
    9,988.56/13,801.32 = 7,908.48/x
  3. Step 3: Cross multiply
    9,988.56x = 13,801.32 × 7,908.48
  4. Step 4: Simplify right side
    9,988.56x = 109,147,463.19
  5. Step 5: Solve for x
    x = 109,147,463.19/9,988.56
  6. Step 6: Final answer
    x = 10,927.25

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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.