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Finding the Fourth Proportional to 18,819.16, 25,987.64 and 12,116.18

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Solution

The fourth proportional to 18,819.16, 25,987.64 and 12,116.18 is: 16,731.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.16 : 25,987.64 = 12,116.18 : x
  2. Step 2: Convert to fraction form
    18,819.16/25,987.64 = 12,116.18/x
  3. Step 3: Cross multiply
    18,819.16x = 25,987.64 × 12,116.18
  4. Step 4: Simplify right side
    18,819.16x = 314,870,924.02
  5. Step 5: Solve for x
    x = 314,870,924.02/18,819.16
  6. Step 6: Final answer
    x = 16,731.40

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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.