Home / 21,124.73-31,687.02-5,329.81

Finding the Fourth Proportional to 21,124.73, 31,687.02 and 5,329.81

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Solution

The fourth proportional to 21,124.73, 31,687.02 and 5,329.81 is: 7,994.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.73 : 31,687.02 = 5,329.81 : x
  2. Step 2: Convert to fraction form
    21,124.73/31,687.02 = 5,329.81/x
  3. Step 3: Cross multiply
    21,124.73x = 31,687.02 × 5,329.81
  4. Step 4: Simplify right side
    21,124.73x = 168,885,796.07
  5. Step 5: Solve for x
    x = 168,885,796.07/21,124.73
  6. Step 6: Final answer
    x = 7,994.70

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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.