Home / 21,093.90-31,620.60-12,200.10

Finding the Fourth Proportional to 21,093.90, 31,620.60 and 12,200.10

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Solution

The fourth proportional to 21,093.90, 31,620.60 and 12,200.10 is: 18,288.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,093.90 : 31,620.60 = 12,200.10 : x
  2. Step 2: Convert to fraction form
    21,093.90/31,620.60 = 12,200.10/x
  3. Step 3: Cross multiply
    21,093.90x = 31,620.60 × 12,200.10
  4. Step 4: Simplify right side
    21,093.90x = 385,774,482.06
  5. Step 5: Solve for x
    x = 385,774,482.06/21,093.90
  6. Step 6: Final answer
    x = 18,288.44

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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.