Home / 21,938.20-32,907.30-12,072.40

Finding the Fourth Proportional to 21,938.20, 32,907.30 and 12,072.40

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Solution

The fourth proportional to 21,938.20, 32,907.30 and 12,072.40 is: 18,108.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.20 : 32,907.30 = 12,072.40 : x
  2. Step 2: Convert to fraction form
    21,938.20/32,907.30 = 12,072.40/x
  3. Step 3: Cross multiply
    21,938.20x = 32,907.30 × 12,072.40
  4. Step 4: Simplify right side
    21,938.20x = 397,270,088.52
  5. Step 5: Solve for x
    x = 397,270,088.52/21,938.20
  6. Step 6: Final answer
    x = 18,108.60

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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.