Home / 21,990.40-32,889.60-19,667.20

Finding the Fourth Proportional to 21,990.40, 32,889.60 and 19,667.20

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Solution

The fourth proportional to 21,990.40, 32,889.60 and 19,667.20 is: 29,414.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.40 : 32,889.60 = 19,667.20 : x
  2. Step 2: Convert to fraction form
    21,990.40/32,889.60 = 19,667.20/x
  3. Step 3: Cross multiply
    21,990.40x = 32,889.60 × 19,667.20
  4. Step 4: Simplify right side
    21,990.40x = 646,846,341.12
  5. Step 5: Solve for x
    x = 646,846,341.12/21,990.40
  6. Step 6: Final answer
    x = 29,414.94

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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.