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Finding the Fourth Proportional to 21,756.94, 30,022.95 and 12,325.30

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Solution

The fourth proportional to 21,756.94, 30,022.95 and 12,325.30 is: 17,007.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,756.94 : 30,022.95 = 12,325.30 : x
  2. Step 2: Convert to fraction form
    21,756.94/30,022.95 = 12,325.30/x
  3. Step 3: Cross multiply
    21,756.94x = 30,022.95 × 12,325.30
  4. Step 4: Simplify right side
    21,756.94x = 370,041,836.80
  5. Step 5: Solve for x
    x = 370,041,836.80/21,756.94
  6. Step 6: Final answer
    x = 17,007.99

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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.