Home / 21,611.05-32,420.04-9,131.20

Finding the Fourth Proportional to 21,611.05, 32,420.04 and 9,131.20

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Solution

The fourth proportional to 21,611.05, 32,420.04 and 9,131.20 is: 13,698.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.05 : 32,420.04 = 9,131.20 : x
  2. Step 2: Convert to fraction form
    21,611.05/32,420.04 = 9,131.20/x
  3. Step 3: Cross multiply
    21,611.05x = 32,420.04 × 9,131.20
  4. Step 4: Simplify right side
    21,611.05x = 296,033,828.72
  5. Step 5: Solve for x
    x = 296,033,828.72/21,611.05
  6. Step 6: Final answer
    x = 13,698.26

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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.