Home / 12,587.72-17,364.66-8,388.68

Finding the Fourth Proportional to 12,587.72, 17,364.66 and 8,388.68

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Solution

The fourth proportional to 12,587.72, 17,364.66 and 8,388.68 is: 11,572.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.72 : 17,364.66 = 8,388.68 : x
  2. Step 2: Convert to fraction form
    12,587.72/17,364.66 = 8,388.68/x
  3. Step 3: Cross multiply
    12,587.72x = 17,364.66 × 8,388.68
  4. Step 4: Simplify right side
    12,587.72x = 145,666,576.05
  5. Step 5: Solve for x
    x = 145,666,576.05/12,587.72
  6. Step 6: Final answer
    x = 11,572.12

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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.