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Finding the Fourth Proportional to 22,395.60, 30,903.92 and 12,964.80

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Solution

The fourth proportional to 22,395.60, 30,903.92 and 12,964.80 is: 17,890.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,395.60 : 30,903.92 = 12,964.80 : x
  2. Step 2: Convert to fraction form
    22,395.60/30,903.92 = 12,964.80/x
  3. Step 3: Cross multiply
    22,395.60x = 30,903.92 × 12,964.80
  4. Step 4: Simplify right side
    22,395.60x = 400,663,142.02
  5. Step 5: Solve for x
    x = 400,663,142.02/22,395.60
  6. Step 6: Final answer
    x = 17,890.26

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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.