Home / 15,505.18-21,397.32-8,431.44

Finding the Fourth Proportional to 15,505.18, 21,397.32 and 8,431.44

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Solution

The fourth proportional to 15,505.18, 21,397.32 and 8,431.44 is: 11,635.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.18 : 21,397.32 = 8,431.44 : x
  2. Step 2: Convert to fraction form
    15,505.18/21,397.32 = 8,431.44/x
  3. Step 3: Cross multiply
    15,505.18x = 21,397.32 × 8,431.44
  4. Step 4: Simplify right side
    15,505.18x = 180,410,219.74
  5. Step 5: Solve for x
    x = 180,410,219.74/15,505.18
  6. Step 6: Final answer
    x = 11,635.48

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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.