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Finding the Fourth Proportional to 20,565.35, 28,857.10 and 20,565.35

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Solution

The fourth proportional to 20,565.35, 28,857.10 and 20,565.35 is: 28,857.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.35 : 28,857.10 = 20,565.35 : x
  2. Step 2: Convert to fraction form
    20,565.35/28,857.10 = 20,565.35/x
  3. Step 3: Cross multiply
    20,565.35x = 28,857.10 × 20,565.35
  4. Step 4: Simplify right side
    20,565.35x = 593,456,361.49
  5. Step 5: Solve for x
    x = 593,456,361.49/20,565.35
  6. Step 6: Final answer
    x = 28,857.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.