Home / 21,163.15-31,558.23-20,973.43

Finding the Fourth Proportional to 21,163.15, 31,558.23 and 20,973.43

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Solution

The fourth proportional to 21,163.15, 31,558.23 and 20,973.43 is: 31,275.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.15 : 31,558.23 = 20,973.43 : x
  2. Step 2: Convert to fraction form
    21,163.15/31,558.23 = 20,973.43/x
  3. Step 3: Cross multiply
    21,163.15x = 31,558.23 × 20,973.43
  4. Step 4: Simplify right side
    21,163.15x = 661,884,065.17
  5. Step 5: Solve for x
    x = 661,884,065.17/21,163.15
  6. Step 6: Final answer
    x = 31,275.32

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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.