Home / 28,371.88-39,140.80-19,875.48

Finding the Fourth Proportional to 28,371.88, 39,140.80 and 19,875.48

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Solution

The fourth proportional to 28,371.88, 39,140.80 and 19,875.48 is: 27,419.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,371.88 : 39,140.80 = 19,875.48 : x
  2. Step 2: Convert to fraction form
    28,371.88/39,140.80 = 19,875.48/x
  3. Step 3: Cross multiply
    28,371.88x = 39,140.80 × 19,875.48
  4. Step 4: Simplify right side
    28,371.88x = 777,942,187.58
  5. Step 5: Solve for x
    x = 777,942,187.58/28,371.88
  6. Step 6: Final answer
    x = 27,419.48

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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.