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Finding the Fourth Proportional to 35,704.40, 53,520.15 and 20,905.70

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Solution

The fourth proportional to 35,704.40, 53,520.15 and 20,905.70 is: 31,337.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,704.40 : 53,520.15 = 20,905.70 : x
  2. Step 2: Convert to fraction form
    35,704.40/53,520.15 = 20,905.70/x
  3. Step 3: Cross multiply
    35,704.40x = 53,520.15 × 20,905.70
  4. Step 4: Simplify right side
    35,704.40x = 1,118,876,199.86
  5. Step 5: Solve for x
    x = 1,118,876,199.86/35,704.40
  6. Step 6: Final answer
    x = 31,337.21

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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.