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Finding the Fourth Proportional to 22,389.80, 33,584.70 and 20,931.80

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Solution

The fourth proportional to 22,389.80, 33,584.70 and 20,931.80 is: 31,397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,389.80 : 33,584.70 = 20,931.80 : x
  2. Step 2: Convert to fraction form
    22,389.80/33,584.70 = 20,931.80/x
  3. Step 3: Cross multiply
    22,389.80x = 33,584.70 × 20,931.80
  4. Step 4: Simplify right side
    22,389.80x = 702,988,223.46
  5. Step 5: Solve for x
    x = 702,988,223.46/22,389.80
  6. Step 6: Final answer
    x = 31,397.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.