Home / 21,277.23-31,866.64-20,539.12

Finding the Fourth Proportional to 21,277.23, 31,866.64 and 20,539.12

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Solution

The fourth proportional to 21,277.23, 31,866.64 and 20,539.12 is: 30,761.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.23 : 31,866.64 = 20,539.12 : x
  2. Step 2: Convert to fraction form
    21,277.23/31,866.64 = 20,539.12/x
  3. Step 3: Cross multiply
    21,277.23x = 31,866.64 × 20,539.12
  4. Step 4: Simplify right side
    21,277.23x = 654,512,729.46
  5. Step 5: Solve for x
    x = 654,512,729.46/21,277.23
  6. Step 6: Final answer
    x = 30,761.18

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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.