Home / 28,420.57-39,221.08-15,673.94

Finding the Fourth Proportional to 28,420.57, 39,221.08 and 15,673.94

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Solution

The fourth proportional to 28,420.57, 39,221.08 and 15,673.94 is: 21,630.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.57 : 39,221.08 = 15,673.94 : x
  2. Step 2: Convert to fraction form
    28,420.57/39,221.08 = 15,673.94/x
  3. Step 3: Cross multiply
    28,420.57x = 39,221.08 × 15,673.94
  4. Step 4: Simplify right side
    28,420.57x = 614,748,766.44
  5. Step 5: Solve for x
    x = 614,748,766.44/28,420.57
  6. Step 6: Final answer
    x = 21,630.42

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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.