Home / 21,840.87-30,140.11-12,150.23

Finding the Fourth Proportional to 21,840.87, 30,140.11 and 12,150.23

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Solution

The fourth proportional to 21,840.87, 30,140.11 and 12,150.23 is: 16,767.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,840.87 : 30,140.11 = 12,150.23 : x
  2. Step 2: Convert to fraction form
    21,840.87/30,140.11 = 12,150.23/x
  3. Step 3: Cross multiply
    21,840.87x = 30,140.11 × 12,150.23
  4. Step 4: Simplify right side
    21,840.87x = 366,209,118.02
  5. Step 5: Solve for x
    x = 366,209,118.02/21,840.87
  6. Step 6: Final answer
    x = 16,767.15

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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.