Home / 21,148.02-31,724.96-7,109.15

Finding the Fourth Proportional to 21,148.02, 31,724.96 and 7,109.15

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Solution

The fourth proportional to 21,148.02, 31,724.96 and 7,109.15 is: 10,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.02 : 31,724.96 = 7,109.15 : x
  2. Step 2: Convert to fraction form
    21,148.02/31,724.96 = 7,109.15/x
  3. Step 3: Cross multiply
    21,148.02x = 31,724.96 × 7,109.15
  4. Step 4: Simplify right side
    21,148.02x = 225,537,305.21
  5. Step 5: Solve for x
    x = 225,537,305.21/21,148.02
  6. Step 6: Final answer
    x = 10,664.70

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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.