Home / 28,156.84-38,854.02-15,578.44

Finding the Fourth Proportional to 28,156.84, 38,854.02 and 15,578.44

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Solution

The fourth proportional to 28,156.84, 38,854.02 and 15,578.44 is: 21,496.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.84 : 38,854.02 = 15,578.44 : x
  2. Step 2: Convert to fraction form
    28,156.84/38,854.02 = 15,578.44/x
  3. Step 3: Cross multiply
    28,156.84x = 38,854.02 × 15,578.44
  4. Step 4: Simplify right side
    28,156.84x = 605,285,019.33
  5. Step 5: Solve for x
    x = 605,285,019.33/28,156.84
  6. Step 6: Final answer
    x = 21,496.91

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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.