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Finding the Fourth Proportional to 40,900.79, 61,351.96 and 12,820.22

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Solution

The fourth proportional to 40,900.79, 61,351.96 and 12,820.22 is: 19,230.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,900.79 : 61,351.96 = 12,820.22 : x
  2. Step 2: Convert to fraction form
    40,900.79/61,351.96 = 12,820.22/x
  3. Step 3: Cross multiply
    40,900.79x = 61,351.96 × 12,820.22
  4. Step 4: Simplify right side
    40,900.79x = 786,545,624.63
  5. Step 5: Solve for x
    x = 786,545,624.63/40,900.79
  6. Step 6: Final answer
    x = 19,230.57

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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.