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Finding the Fourth Proportional to 22,245.16, 30,700.90 and 12,813.48

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Solution

The fourth proportional to 22,245.16, 30,700.90 and 12,813.48 is: 17,684.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,245.16 : 30,700.90 = 12,813.48 : x
  2. Step 2: Convert to fraction form
    22,245.16/30,700.90 = 12,813.48/x
  3. Step 3: Cross multiply
    22,245.16x = 30,700.90 × 12,813.48
  4. Step 4: Simplify right side
    22,245.16x = 393,385,368.13
  5. Step 5: Solve for x
    x = 393,385,368.13/22,245.16
  6. Step 6: Final answer
    x = 17,684.09

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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.