Home / 28,293.75-39,045.39-15,718.50

Finding the Fourth Proportional to 28,293.75, 39,045.39 and 15,718.50

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Solution

The fourth proportional to 28,293.75, 39,045.39 and 15,718.50 is: 21,691.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,293.75 : 39,045.39 = 15,718.50 : x
  2. Step 2: Convert to fraction form
    28,293.75/39,045.39 = 15,718.50/x
  3. Step 3: Cross multiply
    28,293.75x = 39,045.39 × 15,718.50
  4. Step 4: Simplify right side
    28,293.75x = 613,734,962.72
  5. Step 5: Solve for x
    x = 613,734,962.72/28,293.75
  6. Step 6: Final answer
    x = 21,691.54

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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.