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Finding the Fourth Proportional to 18,215.58, 25,138.80 and 10,149.91

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Solution

The fourth proportional to 18,215.58, 25,138.80 and 10,149.91 is: 14,007.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,215.58 : 25,138.80 = 10,149.91 : x
  2. Step 2: Convert to fraction form
    18,215.58/25,138.80 = 10,149.91/x
  3. Step 3: Cross multiply
    18,215.58x = 25,138.80 × 10,149.91
  4. Step 4: Simplify right side
    18,215.58x = 255,156,557.51
  5. Step 5: Solve for x
    x = 255,156,557.51/18,215.58
  6. Step 6: Final answer
    x = 14,007.60

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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.