Home / 20,667.96-28,487.08-15,821.04

Finding the Fourth Proportional to 20,667.96, 28,487.08 and 15,821.04

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Solution

The fourth proportional to 20,667.96, 28,487.08 and 15,821.04 is: 21,806.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.96 : 28,487.08 = 15,821.04 : x
  2. Step 2: Convert to fraction form
    20,667.96/28,487.08 = 15,821.04/x
  3. Step 3: Cross multiply
    20,667.96x = 28,487.08 × 15,821.04
  4. Step 4: Simplify right side
    20,667.96x = 450,695,232.16
  5. Step 5: Solve for x
    x = 450,695,232.16/20,667.96
  6. Step 6: Final answer
    x = 21,806.47

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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.