Home / 20,630.40-31,077.06-18,837.06

Finding the Fourth Proportional to 20,630.40, 31,077.06 and 18,837.06

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Solution

The fourth proportional to 20,630.40, 31,077.06 and 18,837.06 is: 28,375.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.40 : 31,077.06 = 18,837.06 : x
  2. Step 2: Convert to fraction form
    20,630.40/31,077.06 = 18,837.06/x
  3. Step 3: Cross multiply
    20,630.40x = 31,077.06 × 18,837.06
  4. Step 4: Simplify right side
    20,630.40x = 585,400,443.84
  5. Step 5: Solve for x
    x = 585,400,443.84/20,630.40
  6. Step 6: Final answer
    x = 28,375.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.