Home / 20,667.63-28,521.47-11,236.53

Finding the Fourth Proportional to 20,667.63, 28,521.47 and 11,236.53

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Solution

The fourth proportional to 20,667.63, 28,521.47 and 11,236.53 is: 15,506.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.63 : 28,521.47 = 11,236.53 : x
  2. Step 2: Convert to fraction form
    20,667.63/28,521.47 = 11,236.53/x
  3. Step 3: Cross multiply
    20,667.63x = 28,521.47 × 11,236.53
  4. Step 4: Simplify right side
    20,667.63x = 320,482,353.30
  5. Step 5: Solve for x
    x = 320,482,353.30/20,667.63
  6. Step 6: Final answer
    x = 15,506.49

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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.