Home / 21,530.80-32,223.30-18,906.40

Finding the Fourth Proportional to 21,530.80, 32,223.30 and 18,906.40

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Solution

The fourth proportional to 21,530.80, 32,223.30 and 18,906.40 is: 28,295.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.80 : 32,223.30 = 18,906.40 : x
  2. Step 2: Convert to fraction form
    21,530.80/32,223.30 = 18,906.40/x
  3. Step 3: Cross multiply
    21,530.80x = 32,223.30 × 18,906.40
  4. Step 4: Simplify right side
    21,530.80x = 609,226,599.12
  5. Step 5: Solve for x
    x = 609,226,599.12/21,530.80
  6. Step 6: Final answer
    x = 28,295.59

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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.