Home / 12,358.20-18,521.10-8,891.40

Finding the Fourth Proportional to 12,358.20, 18,521.10 and 8,891.40

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Solution

The fourth proportional to 12,358.20, 18,521.10 and 8,891.40 is: 13,325.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,358.20 : 18,521.10 = 8,891.40 : x
  2. Step 2: Convert to fraction form
    12,358.20/18,521.10 = 8,891.40/x
  3. Step 3: Cross multiply
    12,358.20x = 18,521.10 × 8,891.40
  4. Step 4: Simplify right side
    12,358.20x = 164,678,508.54
  5. Step 5: Solve for x
    x = 164,678,508.54/12,358.20
  6. Step 6: Final answer
    x = 13,325.44

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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.