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Finding the Fourth Proportional to 18,438.77, 27,658.23 and 4,587.77

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Solution

The fourth proportional to 18,438.77, 27,658.23 and 4,587.77 is: 6,881.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.77 : 27,658.23 = 4,587.77 : x
  2. Step 2: Convert to fraction form
    18,438.77/27,658.23 = 4,587.77/x
  3. Step 3: Cross multiply
    18,438.77x = 27,658.23 × 4,587.77
  4. Step 4: Simplify right side
    18,438.77x = 126,889,649.79
  5. Step 5: Solve for x
    x = 126,889,649.79/18,438.77
  6. Step 6: Final answer
    x = 6,881.68

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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.