Home / 18,936.61-28,533.22-15,721.72

Finding the Fourth Proportional to 18,936.61, 28,533.22 and 15,721.72

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Solution

The fourth proportional to 18,936.61, 28,533.22 and 15,721.72 is: 23,689.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,936.61 : 28,533.22 = 15,721.72 : x
  2. Step 2: Convert to fraction form
    18,936.61/28,533.22 = 15,721.72/x
  3. Step 3: Cross multiply
    18,936.61x = 28,533.22 × 15,721.72
  4. Step 4: Simplify right side
    18,936.61x = 448,591,184.90
  5. Step 5: Solve for x
    x = 448,591,184.90/18,936.61
  6. Step 6: Final answer
    x = 23,689.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.