Home / 21,319.73-31,979.68-6,528.59

Finding the Fourth Proportional to 21,319.73, 31,979.68 and 6,528.59

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Solution

The fourth proportional to 21,319.73, 31,979.68 and 6,528.59 is: 9,792.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.73 : 31,979.68 = 6,528.59 : x
  2. Step 2: Convert to fraction form
    21,319.73/31,979.68 = 6,528.59/x
  3. Step 3: Cross multiply
    21,319.73x = 31,979.68 × 6,528.59
  4. Step 4: Simplify right side
    21,319.73x = 208,782,186.41
  5. Step 5: Solve for x
    x = 208,782,186.41/21,319.73
  6. Step 6: Final answer
    x = 9,792.91

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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.