Home / 21,750.66-30,014.87-12,189.38

Finding the Fourth Proportional to 21,750.66, 30,014.87 and 12,189.38

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Solution

The fourth proportional to 21,750.66, 30,014.87 and 12,189.38 is: 16,820.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.66 : 30,014.87 = 12,189.38 : x
  2. Step 2: Convert to fraction form
    21,750.66/30,014.87 = 12,189.38/x
  3. Step 3: Cross multiply
    21,750.66x = 30,014.87 × 12,189.38
  4. Step 4: Simplify right side
    21,750.66x = 365,862,445.06
  5. Step 5: Solve for x
    x = 365,862,445.06/21,750.66
  6. Step 6: Final answer
    x = 16,820.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.