Home / 31,617.51-43,641.25-20,870.22

Finding the Fourth Proportional to 31,617.51, 43,641.25 and 20,870.22

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Solution

The fourth proportional to 31,617.51, 43,641.25 and 20,870.22 is: 28,806.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,617.51 : 43,641.25 = 20,870.22 : x
  2. Step 2: Convert to fraction form
    31,617.51/43,641.25 = 20,870.22/x
  3. Step 3: Cross multiply
    31,617.51x = 43,641.25 × 20,870.22
  4. Step 4: Simplify right side
    31,617.51x = 910,802,600.05
  5. Step 5: Solve for x
    x = 910,802,600.05/31,617.51
  6. Step 6: Final answer
    x = 28,806.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.