Home / 13,439.68-18,544.72-7,471.40

Finding the Fourth Proportional to 13,439.68, 18,544.72 and 7,471.40

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Solution

The fourth proportional to 13,439.68, 18,544.72 and 7,471.40 is: 10,309.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.68 : 18,544.72 = 7,471.40 : x
  2. Step 2: Convert to fraction form
    13,439.68/18,544.72 = 7,471.40/x
  3. Step 3: Cross multiply
    13,439.68x = 18,544.72 × 7,471.40
  4. Step 4: Simplify right side
    13,439.68x = 138,555,021.01
  5. Step 5: Solve for x
    x = 138,555,021.01/13,439.68
  6. Step 6: Final answer
    x = 10,309.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.