Home / 21,807.40-30,091.62-12,247.78

Finding the Fourth Proportional to 21,807.40, 30,091.62 and 12,247.78

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Solution

The fourth proportional to 21,807.40, 30,091.62 and 12,247.78 is: 16,900.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,807.40 : 30,091.62 = 12,247.78 : x
  2. Step 2: Convert to fraction form
    21,807.40/30,091.62 = 12,247.78/x
  3. Step 3: Cross multiply
    21,807.40x = 30,091.62 × 12,247.78
  4. Step 4: Simplify right side
    21,807.40x = 368,555,541.60
  5. Step 5: Solve for x
    x = 368,555,541.60/21,807.40
  6. Step 6: Final answer
    x = 16,900.48

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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.