Home / 39,785.70-59,678.55-18,712.64

Finding the Fourth Proportional to 39,785.70, 59,678.55 and 18,712.64

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Solution

The fourth proportional to 39,785.70, 59,678.55 and 18,712.64 is: 28,068.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,785.70 : 59,678.55 = 18,712.64 : x
  2. Step 2: Convert to fraction form
    39,785.70/59,678.55 = 18,712.64/x
  3. Step 3: Cross multiply
    39,785.70x = 59,678.55 × 18,712.64
  4. Step 4: Simplify right side
    39,785.70x = 1,116,743,221.87
  5. Step 5: Solve for x
    x = 1,116,743,221.87/39,785.70
  6. Step 6: Final answer
    x = 28,068.96

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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.