Home / 21,189.14-31,785.56-7,862.28

Finding the Fourth Proportional to 21,189.14, 31,785.56 and 7,862.28

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Solution

The fourth proportional to 21,189.14, 31,785.56 and 7,862.28 is: 11,794.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.14 : 31,785.56 = 7,862.28 : x
  2. Step 2: Convert to fraction form
    21,189.14/31,785.56 = 7,862.28/x
  3. Step 3: Cross multiply
    21,189.14x = 31,785.56 × 7,862.28
  4. Step 4: Simplify right side
    21,189.14x = 249,906,933.37
  5. Step 5: Solve for x
    x = 249,906,933.37/21,189.14
  6. Step 6: Final answer
    x = 11,794.11

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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.