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Finding the Fourth Proportional to 18,168.19, 25,071.13 and 10,209.90

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Solution

The fourth proportional to 18,168.19, 25,071.13 and 10,209.90 is: 14,089.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,168.19 : 25,071.13 = 10,209.90 : x
  2. Step 2: Convert to fraction form
    18,168.19/25,071.13 = 10,209.90/x
  3. Step 3: Cross multiply
    18,168.19x = 25,071.13 × 10,209.90
  4. Step 4: Simplify right side
    18,168.19x = 255,973,730.19
  5. Step 5: Solve for x
    x = 255,973,730.19/18,168.19
  6. Step 6: Final answer
    x = 14,089.12

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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.