Home / 42,785.42-64,172.66-17,820.81

Finding the Fourth Proportional to 42,785.42, 64,172.66 and 17,820.81

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Solution

The fourth proportional to 42,785.42, 64,172.66 and 17,820.81 is: 26,728.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,785.42 : 64,172.66 = 17,820.81 : x
  2. Step 2: Convert to fraction form
    42,785.42/64,172.66 = 17,820.81/x
  3. Step 3: Cross multiply
    42,785.42x = 64,172.66 × 17,820.81
  4. Step 4: Simplify right side
    42,785.42x = 1,143,608,691.95
  5. Step 5: Solve for x
    x = 1,143,608,691.95/42,785.42
  6. Step 6: Final answer
    x = 26,728.94

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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.