Home / 28,136.08-38,826.22-15,386.72

Finding the Fourth Proportional to 28,136.08, 38,826.22 and 15,386.72

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Solution

The fourth proportional to 28,136.08, 38,826.22 and 15,386.72 is: 21,232.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136.08 : 38,826.22 = 15,386.72 : x
  2. Step 2: Convert to fraction form
    28,136.08/38,826.22 = 15,386.72/x
  3. Step 3: Cross multiply
    28,136.08x = 38,826.22 × 15,386.72
  4. Step 4: Simplify right side
    28,136.08x = 597,408,175.80
  5. Step 5: Solve for x
    x = 597,408,175.80/28,136.08
  6. Step 6: Final answer
    x = 21,232.81

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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.