Home / 21,293.80-31,939.29-8,810.56

Finding the Fourth Proportional to 21,293.80, 31,939.29 and 8,810.56

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Solution

The fourth proportional to 21,293.80, 31,939.29 and 8,810.56 is: 13,215.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.80 : 31,939.29 = 8,810.56 : x
  2. Step 2: Convert to fraction form
    21,293.80/31,939.29 = 8,810.56/x
  3. Step 3: Cross multiply
    21,293.80x = 31,939.29 × 8,810.56
  4. Step 4: Simplify right side
    21,293.80x = 281,403,030.90
  5. Step 5: Solve for x
    x = 281,403,030.90/21,293.80
  6. Step 6: Final answer
    x = 13,215.26

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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.