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Finding the Fourth Proportional to 22,403.40, 33,615.90 and 15,815.40

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Solution

The fourth proportional to 22,403.40, 33,615.90 and 15,815.40 is: 23,730.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,403.40 : 33,615.90 = 15,815.40 : x
  2. Step 2: Convert to fraction form
    22,403.40/33,615.90 = 15,815.40/x
  3. Step 3: Cross multiply
    22,403.40x = 33,615.90 × 15,815.40
  4. Step 4: Simplify right side
    22,403.40x = 531,648,904.86
  5. Step 5: Solve for x
    x = 531,648,904.86/22,403.40
  6. Step 6: Final answer
    x = 23,730.72

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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.