Home / 28,358.40-39,139.20-17,185.92

Finding the Fourth Proportional to 28,358.40, 39,139.20 and 17,185.92

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Solution

The fourth proportional to 28,358.40, 39,139.20 and 17,185.92 is: 23,719.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.40 : 39,139.20 = 17,185.92 : x
  2. Step 2: Convert to fraction form
    28,358.40/39,139.20 = 17,185.92/x
  3. Step 3: Cross multiply
    28,358.40x = 39,139.20 × 17,185.92
  4. Step 4: Simplify right side
    28,358.40x = 672,643,160.06
  5. Step 5: Solve for x
    x = 672,643,160.06/28,358.40
  6. Step 6: Final answer
    x = 23,719.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.