Home / 20,980.56-31,376.16-18,654.24

Finding the Fourth Proportional to 20,980.56, 31,376.16 and 18,654.24

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Solution

The fourth proportional to 20,980.56, 31,376.16 and 18,654.24 is: 27,897.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.56 : 31,376.16 = 18,654.24 : x
  2. Step 2: Convert to fraction form
    20,980.56/31,376.16 = 18,654.24/x
  3. Step 3: Cross multiply
    20,980.56x = 31,376.16 × 18,654.24
  4. Step 4: Simplify right side
    20,980.56x = 585,298,418.92
  5. Step 5: Solve for x
    x = 585,298,418.92/20,980.56
  6. Step 6: Final answer
    x = 27,897.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.