Home / 12,219.72-18,330.64-3,900.92

Finding the Fourth Proportional to 12,219.72, 18,330.64 and 3,900.92

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Solution

The fourth proportional to 12,219.72, 18,330.64 and 3,900.92 is: 5,851.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.72 : 18,330.64 = 3,900.92 : x
  2. Step 2: Convert to fraction form
    12,219.72/18,330.64 = 3,900.92/x
  3. Step 3: Cross multiply
    12,219.72x = 18,330.64 × 3,900.92
  4. Step 4: Simplify right side
    12,219.72x = 71,506,360.19
  5. Step 5: Solve for x
    x = 71,506,360.19/12,219.72
  6. Step 6: Final answer
    x = 5,851.72

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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.