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Finding the Fourth Proportional to 12,587.69, 18,881.53 and 5,993.88

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Solution

The fourth proportional to 12,587.69, 18,881.53 and 5,993.88 is: 8,990.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.69 : 18,881.53 = 5,993.88 : x
  2. Step 2: Convert to fraction form
    12,587.69/18,881.53 = 5,993.88/x
  3. Step 3: Cross multiply
    12,587.69x = 18,881.53 × 5,993.88
  4. Step 4: Simplify right side
    12,587.69x = 113,173,703.33
  5. Step 5: Solve for x
    x = 113,173,703.33/12,587.69
  6. Step 6: Final answer
    x = 8,990.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.