Home / 20,667.72-28,521.54-12,284.28

Finding the Fourth Proportional to 20,667.72, 28,521.54 and 12,284.28

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Solution

The fourth proportional to 20,667.72, 28,521.54 and 12,284.28 is: 16,952.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.72 : 28,521.54 = 12,284.28 : x
  2. Step 2: Convert to fraction form
    20,667.72/28,521.54 = 12,284.28/x
  3. Step 3: Cross multiply
    20,667.72x = 28,521.54 × 12,284.28
  4. Step 4: Simplify right side
    20,667.72x = 350,366,583.39
  5. Step 5: Solve for x
    x = 350,366,583.39/20,667.72
  6. Step 6: Final answer
    x = 16,952.36

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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.