Home / 22,189.78-30,621.49-12,117.95

Finding the Fourth Proportional to 22,189.78, 30,621.49 and 12,117.95

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Solution

The fourth proportional to 22,189.78, 30,621.49 and 12,117.95 is: 16,722.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,189.78 : 30,621.49 = 12,117.95 : x
  2. Step 2: Convert to fraction form
    22,189.78/30,621.49 = 12,117.95/x
  3. Step 3: Cross multiply
    22,189.78x = 30,621.49 × 12,117.95
  4. Step 4: Simplify right side
    22,189.78x = 371,069,501.34
  5. Step 5: Solve for x
    x = 371,069,501.34/22,189.78
  6. Step 6: Final answer
    x = 16,722.54

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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.