Home / 20,667.51-28,521.04-11,235.87

Finding the Fourth Proportional to 20,667.51, 28,521.04 and 11,235.87

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Solution

The fourth proportional to 20,667.51, 28,521.04 and 11,235.87 is: 15,505.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.51 : 28,521.04 = 11,235.87 : x
  2. Step 2: Convert to fraction form
    20,667.51/28,521.04 = 11,235.87/x
  3. Step 3: Cross multiply
    20,667.51x = 28,521.04 × 11,235.87
  4. Step 4: Simplify right side
    20,667.51x = 320,458,697.70
  5. Step 5: Solve for x
    x = 320,458,697.70/20,667.51
  6. Step 6: Final answer
    x = 15,505.43

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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.