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Finding the Fourth Proportional to 9,901.74, 13,664.39 and 5,425.58

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Solution

The fourth proportional to 9,901.74, 13,664.39 and 5,425.58 is: 7,487.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,901.74 : 13,664.39 = 5,425.58 : x
  2. Step 2: Convert to fraction form
    9,901.74/13,664.39 = 5,425.58/x
  3. Step 3: Cross multiply
    9,901.74x = 13,664.39 × 5,425.58
  4. Step 4: Simplify right side
    9,901.74x = 74,137,145.65
  5. Step 5: Solve for x
    x = 74,137,145.65/9,901.74
  6. Step 6: Final answer
    x = 7,487.28

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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.