Home / 20,586.54-28,398.96-13,020.12

Finding the Fourth Proportional to 20,586.54, 28,398.96 and 13,020.12

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Solution

The fourth proportional to 20,586.54, 28,398.96 and 13,020.12 is: 17,961.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.54 : 28,398.96 = 13,020.12 : x
  2. Step 2: Convert to fraction form
    20,586.54/28,398.96 = 13,020.12/x
  3. Step 3: Cross multiply
    20,586.54x = 28,398.96 × 13,020.12
  4. Step 4: Simplify right side
    20,586.54x = 369,757,867.08
  5. Step 5: Solve for x
    x = 369,757,867.08/20,586.54
  6. Step 6: Final answer
    x = 17,961.15

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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.