Home / 21,228.96-29,287.80-13,674.70

Finding the Fourth Proportional to 21,228.96, 29,287.80 and 13,674.70

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Solution

The fourth proportional to 21,228.96, 29,287.80 and 13,674.70 is: 18,865.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.96 : 29,287.80 = 13,674.70 : x
  2. Step 2: Convert to fraction form
    21,228.96/29,287.80 = 13,674.70/x
  3. Step 3: Cross multiply
    21,228.96x = 29,287.80 × 13,674.70
  4. Step 4: Simplify right side
    21,228.96x = 400,501,805.44
  5. Step 5: Solve for x
    x = 400,501,805.44/21,228.96
  6. Step 6: Final answer
    x = 18,865.82

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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.