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Finding the Fourth Proportional to 20,565.60, 30,913.20 and 19,010.40

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Solution

The fourth proportional to 20,565.60, 30,913.20 and 19,010.40 is: 28,575.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.60 : 30,913.20 = 19,010.40 : x
  2. Step 2: Convert to fraction form
    20,565.60/30,913.20 = 19,010.40/x
  3. Step 3: Cross multiply
    20,565.60x = 30,913.20 × 19,010.40
  4. Step 4: Simplify right side
    20,565.60x = 587,672,297.28
  5. Step 5: Solve for x
    x = 587,672,297.28/20,565.60
  6. Step 6: Final answer
    x = 28,575.50

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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.