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Finding the Fourth Proportional to 12,605.79, 18,897.71 and 9,087.15

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Solution

The fourth proportional to 12,605.79, 18,897.71 and 9,087.15 is: 13,622.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,605.79 : 18,897.71 = 9,087.15 : x
  2. Step 2: Convert to fraction form
    12,605.79/18,897.71 = 9,087.15/x
  3. Step 3: Cross multiply
    12,605.79x = 18,897.71 × 9,087.15
  4. Step 4: Simplify right side
    12,605.79x = 171,726,279.99
  5. Step 5: Solve for x
    x = 171,726,279.99/12,605.79
  6. Step 6: Final answer
    x = 13,622.81

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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.