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Finding the Fourth Proportional to 20,666.64, 30,859.60 and 20,106.13

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Solution

The fourth proportional to 20,666.64, 30,859.60 and 20,106.13 is: 30,022.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.64 : 30,859.60 = 20,106.13 : x
  2. Step 2: Convert to fraction form
    20,666.64/30,859.60 = 20,106.13/x
  3. Step 3: Cross multiply
    20,666.64x = 30,859.60 × 20,106.13
  4. Step 4: Simplify right side
    20,666.64x = 620,467,132.01
  5. Step 5: Solve for x
    x = 620,467,132.01/20,666.64
  6. Step 6: Final answer
    x = 30,022.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.