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Finding the Fourth Proportional to 22,122.01, 30,529.00 and 12,690.57

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Solution

The fourth proportional to 22,122.01, 30,529.00 and 12,690.57 is: 17,513.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,122.01 : 30,529.00 = 12,690.57 : x
  2. Step 2: Convert to fraction form
    22,122.01/30,529.00 = 12,690.57/x
  3. Step 3: Cross multiply
    22,122.01x = 30,529.00 × 12,690.57
  4. Step 4: Simplify right side
    22,122.01x = 387,430,541.88
  5. Step 5: Solve for x
    x = 387,430,541.88/22,122.01
  6. Step 6: Final answer
    x = 17,513.35

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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.