Home / 12,581.99-18,865.69-5,178.08

Finding the Fourth Proportional to 12,581.99, 18,865.69 and 5,178.08

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Solution

The fourth proportional to 12,581.99, 18,865.69 and 5,178.08 is: 7,764.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.99 : 18,865.69 = 5,178.08 : x
  2. Step 2: Convert to fraction form
    12,581.99/18,865.69 = 5,178.08/x
  3. Step 3: Cross multiply
    12,581.99x = 18,865.69 × 5,178.08
  4. Step 4: Simplify right side
    12,581.99x = 97,688,086.29
  5. Step 5: Solve for x
    x = 97,688,086.29/12,581.99
  6. Step 6: Final answer
    x = 7,764.12

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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.