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Finding the Fourth Proportional to 13,424.68, 18,526 and 7,456.32

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Solution

The fourth proportional to 13,424.68, 18,526 and 7,456.32 is: 10,289.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.68 : 18,526 = 7,456.32 : x
  2. Step 2: Convert to fraction form
    13,424.68/18,526 = 7,456.32/x
  3. Step 3: Cross multiply
    13,424.68x = 18,526 × 7,456.32
  4. Step 4: Simplify right side
    13,424.68x = 138,135,784.32
  5. Step 5: Solve for x
    x = 138,135,784.32/13,424.68
  6. Step 6: Final answer
    x = 10,289.69

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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.