Home / 21,013.76-31,527.84-7,172.48

Finding the Fourth Proportional to 21,013.76, 31,527.84 and 7,172.48

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Solution

The fourth proportional to 21,013.76, 31,527.84 and 7,172.48 is: 10,761.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.76 : 31,527.84 = 7,172.48 : x
  2. Step 2: Convert to fraction form
    21,013.76/31,527.84 = 7,172.48/x
  3. Step 3: Cross multiply
    21,013.76x = 31,527.84 × 7,172.48
  4. Step 4: Simplify right side
    21,013.76x = 226,132,801.84
  5. Step 5: Solve for x
    x = 226,132,801.84/21,013.76
  6. Step 6: Final answer
    x = 10,761.18

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1.5x scale

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.