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Finding the Fourth Proportional to 22,178.94, 30,606.94 and 15,117.70

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Solution

The fourth proportional to 22,178.94, 30,606.94 and 15,117.70 is: 20,862.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,178.94 : 30,606.94 = 15,117.70 : x
  2. Step 2: Convert to fraction form
    22,178.94/30,606.94 = 15,117.70/x
  3. Step 3: Cross multiply
    22,178.94x = 30,606.94 × 15,117.70
  4. Step 4: Simplify right side
    22,178.94x = 462,706,536.84
  5. Step 5: Solve for x
    x = 462,706,536.84/22,178.94
  6. Step 6: Final answer
    x = 20,862.43

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Double scale
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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.