Home / 31,291.84-43,166.40-21,220.48

Finding the Fourth Proportional to 31,291.84, 43,166.40 and 21,220.48

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Solution

The fourth proportional to 31,291.84, 43,166.40 and 21,220.48 is: 29,273.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,291.84 : 43,166.40 = 21,220.48 : x
  2. Step 2: Convert to fraction form
    31,291.84/43,166.40 = 21,220.48/x
  3. Step 3: Cross multiply
    31,291.84x = 43,166.40 × 21,220.48
  4. Step 4: Simplify right side
    31,291.84x = 916,011,727.87
  5. Step 5: Solve for x
    x = 916,011,727.87/31,291.84
  6. Step 6: Final answer
    x = 29,273.18

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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.