Home / 20,439.08-28,206.49-11,487.40

Finding the Fourth Proportional to 20,439.08, 28,206.49 and 11,487.40

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Solution

The fourth proportional to 20,439.08, 28,206.49 and 11,487.40 is: 15,852.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.08 : 28,206.49 = 11,487.40 : x
  2. Step 2: Convert to fraction form
    20,439.08/28,206.49 = 11,487.40/x
  3. Step 3: Cross multiply
    20,439.08x = 28,206.49 × 11,487.40
  4. Step 4: Simplify right side
    20,439.08x = 324,019,233.23
  5. Step 5: Solve for x
    x = 324,019,233.23/20,439.08
  6. Step 6: Final answer
    x = 15,852.93

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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.