Home / 21,283.13-31,928.79-7,242.59

Finding the Fourth Proportional to 21,283.13, 31,928.79 and 7,242.59

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Solution

The fourth proportional to 21,283.13, 31,928.79 and 7,242.59 is: 10,865.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,283.13 : 31,928.79 = 7,242.59 : x
  2. Step 2: Convert to fraction form
    21,283.13/31,928.79 = 7,242.59/x
  3. Step 3: Cross multiply
    21,283.13x = 31,928.79 × 7,242.59
  4. Step 4: Simplify right side
    21,283.13x = 231,247,135.17
  5. Step 5: Solve for x
    x = 231,247,135.17/21,283.13
  6. Step 6: Final answer
    x = 10,865.28

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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.