Home / 22,218.31-30,664.61-12,785.05

Finding the Fourth Proportional to 22,218.31, 30,664.61 and 12,785.05

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Solution

The fourth proportional to 22,218.31, 30,664.61 and 12,785.05 is: 17,645.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,218.31 : 30,664.61 = 12,785.05 : x
  2. Step 2: Convert to fraction form
    22,218.31/30,664.61 = 12,785.05/x
  3. Step 3: Cross multiply
    22,218.31x = 30,664.61 × 12,785.05
  4. Step 4: Simplify right side
    22,218.31x = 392,048,572.08
  5. Step 5: Solve for x
    x = 392,048,572.08/22,218.31
  6. Step 6: Final answer
    x = 17,645.29

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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.