Home / 21,445.36-31,939.31-20,173.25

Finding the Fourth Proportional to 21,445.36, 31,939.31 and 20,173.25

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Solution

The fourth proportional to 21,445.36, 31,939.31 and 20,173.25 is: 30,044.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,445.36 : 31,939.31 = 20,173.25 : x
  2. Step 2: Convert to fraction form
    21,445.36/31,939.31 = 20,173.25/x
  3. Step 3: Cross multiply
    21,445.36x = 31,939.31 × 20,173.25
  4. Step 4: Simplify right side
    21,445.36x = 644,319,815.74
  5. Step 5: Solve for x
    x = 644,319,815.74/21,445.36
  6. Step 6: Final answer
    x = 30,044.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.