Home / 12,541.40-18,815.00-4,221.20

Finding the Fourth Proportional to 12,541.40, 18,815.00 and 4,221.20

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Solution

The fourth proportional to 12,541.40, 18,815.00 and 4,221.20 is: 6,332.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,541.40 : 18,815.00 = 4,221.20 : x
  2. Step 2: Convert to fraction form
    12,541.40/18,815.00 = 4,221.20/x
  3. Step 3: Cross multiply
    12,541.40x = 18,815.00 × 4,221.20
  4. Step 4: Simplify right side
    12,541.40x = 79,421,903.93
  5. Step 5: Solve for x
    x = 79,421,903.93/12,541.40
  6. Step 6: Final answer
    x = 6,332.78

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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.