Home / 28,196.76-38,911.48-15,621.52

Finding the Fourth Proportional to 28,196.76, 38,911.48 and 15,621.52

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Solution

The fourth proportional to 28,196.76, 38,911.48 and 15,621.52 is: 21,557.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,196.76 : 38,911.48 = 15,621.52 : x
  2. Step 2: Convert to fraction form
    28,196.76/38,911.48 = 15,621.52/x
  3. Step 3: Cross multiply
    28,196.76x = 38,911.48 × 15,621.52
  4. Step 4: Simplify right side
    28,196.76x = 607,856,463.05
  5. Step 5: Solve for x
    x = 607,856,463.05/28,196.76
  6. Step 6: Final answer
    x = 21,557.67

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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.