Home / 20,667.57-28,521.36-11,235.93

Finding the Fourth Proportional to 20,667.57, 28,521.36 and 11,235.93

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Solution

The fourth proportional to 20,667.57, 28,521.36 and 11,235.93 is: 15,505.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.57 : 28,521.36 = 11,235.93 : x
  2. Step 2: Convert to fraction form
    20,667.57/28,521.36 = 11,235.93/x
  3. Step 3: Cross multiply
    20,667.57x = 28,521.36 × 11,235.93
  4. Step 4: Simplify right side
    20,667.57x = 320,464,004.46
  5. Step 5: Solve for x
    x = 320,464,004.46/20,667.57
  6. Step 6: Final answer
    x = 15,505.65

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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.