Home / 21,091.04-31,641.40-7,240

Finding the Fourth Proportional to 21,091.04, 31,641.40 and 7,240

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Solution

The fourth proportional to 21,091.04, 31,641.40 and 7,240 is: 10,861.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.04 : 31,641.40 = 7,240 : x
  2. Step 2: Convert to fraction form
    21,091.04/31,641.40 = 7,240/x
  3. Step 3: Cross multiply
    21,091.04x = 31,641.40 × 7,240
  4. Step 4: Simplify right side
    21,091.04x = 229,083,736
  5. Step 5: Solve for x
    x = 229,083,736/21,091.04
  6. Step 6: Final answer
    x = 10,861.66

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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.