Home / 12,154.78-18,235.25-3,389.70

Finding the Fourth Proportional to 12,154.78, 18,235.25 and 3,389.70

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Solution

The fourth proportional to 12,154.78, 18,235.25 and 3,389.70 is: 5,085.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,154.78 : 18,235.25 = 3,389.70 : x
  2. Step 2: Convert to fraction form
    12,154.78/18,235.25 = 3,389.70/x
  3. Step 3: Cross multiply
    12,154.78x = 18,235.25 × 3,389.70
  4. Step 4: Simplify right side
    12,154.78x = 61,811,937.21
  5. Step 5: Solve for x
    x = 61,811,937.21/12,154.78
  6. Step 6: Final answer
    x = 5,085.40

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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.