Home / 21,657.15-32,486.94-20,479.01

Finding the Fourth Proportional to 21,657.15, 32,486.94 and 20,479.01

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Solution

The fourth proportional to 21,657.15, 32,486.94 and 20,479.01 is: 30,719.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,657.15 : 32,486.94 = 20,479.01 : x
  2. Step 2: Convert to fraction form
    21,657.15/32,486.94 = 20,479.01/x
  3. Step 3: Cross multiply
    21,657.15x = 32,486.94 × 20,479.01
  4. Step 4: Simplify right side
    21,657.15x = 665,300,206.69
  5. Step 5: Solve for x
    x = 665,300,206.69/21,657.15
  6. Step 6: Final answer
    x = 30,719.66

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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.