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Finding the Fourth Proportional to 22,285.32, 30,749.84 and 12,720.84

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Solution

The fourth proportional to 22,285.32, 30,749.84 and 12,720.84 is: 17,552.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,285.32 : 30,749.84 = 12,720.84 : x
  2. Step 2: Convert to fraction form
    22,285.32/30,749.84 = 12,720.84/x
  3. Step 3: Cross multiply
    22,285.32x = 30,749.84 × 12,720.84
  4. Step 4: Simplify right side
    22,285.32x = 391,163,731.06
  5. Step 5: Solve for x
    x = 391,163,731.06/22,285.32
  6. Step 6: Final answer
    x = 17,552.53

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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.