Home / 20,667.95-28,520.98-11,236.51

Finding the Fourth Proportional to 20,667.95, 28,520.98 and 11,236.51

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Solution

The fourth proportional to 20,667.95, 28,520.98 and 11,236.51 is: 15,505.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.95 : 28,520.98 = 11,236.51 : x
  2. Step 2: Convert to fraction form
    20,667.95/28,520.98 = 11,236.51/x
  3. Step 3: Cross multiply
    20,667.95x = 28,520.98 × 11,236.51
  4. Step 4: Simplify right side
    20,667.95x = 320,476,276.98
  5. Step 5: Solve for x
    x = 320,476,276.98/20,667.95
  6. Step 6: Final answer
    x = 15,505.95

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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.