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Finding the Fourth Proportional to 48,607.70, 72,911.55 and 20,905.70

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Solution

The fourth proportional to 48,607.70, 72,911.55 and 20,905.70 is: 31,358.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,607.70 : 72,911.55 = 20,905.70 : x
  2. Step 2: Convert to fraction form
    48,607.70/72,911.55 = 20,905.70/x
  3. Step 3: Cross multiply
    48,607.70x = 72,911.55 × 20,905.70
  4. Step 4: Simplify right side
    48,607.70x = 1,524,266,990.84
  5. Step 5: Solve for x
    x = 1,524,266,990.84/48,607.70
  6. Step 6: Final answer
    x = 31,358.55

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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.