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Finding the Fourth Proportional to 12,487.77, 18,726.73 and 5,089.57

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Solution

The fourth proportional to 12,487.77, 18,726.73 and 5,089.57 is: 7,632.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.77 : 18,726.73 = 5,089.57 : x
  2. Step 2: Convert to fraction form
    12,487.77/18,726.73 = 5,089.57/x
  3. Step 3: Cross multiply
    12,487.77x = 18,726.73 × 5,089.57
  4. Step 4: Simplify right side
    12,487.77x = 95,310,943.67
  5. Step 5: Solve for x
    x = 95,310,943.67/12,487.77
  6. Step 6: Final answer
    x = 7,632.34

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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.