Home / 12,572.81-18,861.51-4,139.79

Finding the Fourth Proportional to 12,572.81, 18,861.51 and 4,139.79

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Solution

The fourth proportional to 12,572.81, 18,861.51 and 4,139.79 is: 6,210.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,572.81 : 18,861.51 = 4,139.79 : x
  2. Step 2: Convert to fraction form
    12,572.81/18,861.51 = 4,139.79/x
  3. Step 3: Cross multiply
    12,572.81x = 18,861.51 × 4,139.79
  4. Step 4: Simplify right side
    12,572.81x = 78,082,690.48
  5. Step 5: Solve for x
    x = 78,082,690.48/12,572.81
  6. Step 6: Final answer
    x = 6,210.44

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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.