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Finding the Fourth Proportional to 35,248.76, 48,638.78 and 20,142.40

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Solution

The fourth proportional to 35,248.76, 48,638.78 and 20,142.40 is: 27,793.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,248.76 : 48,638.78 = 20,142.40 : x
  2. Step 2: Convert to fraction form
    35,248.76/48,638.78 = 20,142.40/x
  3. Step 3: Cross multiply
    35,248.76x = 48,638.78 × 20,142.40
  4. Step 4: Simplify right side
    35,248.76x = 979,701,762.27
  5. Step 5: Solve for x
    x = 979,701,762.27/35,248.76
  6. Step 6: Final answer
    x = 27,793.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.