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Finding the Fourth Proportional to 13,064.97, 18,018.48 and 8,815.30

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Solution

The fourth proportional to 13,064.97, 18,018.48 and 8,815.30 is: 12,157.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,064.97 : 18,018.48 = 8,815.30 : x
  2. Step 2: Convert to fraction form
    13,064.97/18,018.48 = 8,815.30/x
  3. Step 3: Cross multiply
    13,064.97x = 18,018.48 × 8,815.30
  4. Step 4: Simplify right side
    13,064.97x = 158,838,306.74
  5. Step 5: Solve for x
    x = 158,838,306.74/13,064.97
  6. Step 6: Final answer
    x = 12,157.58

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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.