Home / 28,419.76-39,220.20-15,673.50

Finding the Fourth Proportional to 28,419.76, 39,220.20 and 15,673.50

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Solution

The fourth proportional to 28,419.76, 39,220.20 and 15,673.50 is: 21,629.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,419.76 : 39,220.20 = 15,673.50 : x
  2. Step 2: Convert to fraction form
    28,419.76/39,220.20 = 15,673.50/x
  3. Step 3: Cross multiply
    28,419.76x = 39,220.20 × 15,673.50
  4. Step 4: Simplify right side
    28,419.76x = 614,717,804.70
  5. Step 5: Solve for x
    x = 614,717,804.70/28,419.76
  6. Step 6: Final answer
    x = 21,629.94

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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.