Home / 22,219.81-30,666.68-12,786.55

Finding the Fourth Proportional to 22,219.81, 30,666.68 and 12,786.55

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Solution

The fourth proportional to 22,219.81, 30,666.68 and 12,786.55 is: 17,647.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,219.81 : 30,666.68 = 12,786.55 : x
  2. Step 2: Convert to fraction form
    22,219.81/30,666.68 = 12,786.55/x
  3. Step 3: Cross multiply
    22,219.81x = 30,666.68 × 12,786.55
  4. Step 4: Simplify right side
    22,219.81x = 392,121,037.15
  5. Step 5: Solve for x
    x = 392,121,037.15/22,219.81
  6. Step 6: Final answer
    x = 17,647.36

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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.