Home / 10,915.05-16,372.58-7,221.45

Finding the Fourth Proportional to 10,915.05, 16,372.58 and 7,221.45

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Solution

The fourth proportional to 10,915.05, 16,372.58 and 7,221.45 is: 10,832.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,915.05 : 16,372.58 = 7,221.45 : x
  2. Step 2: Convert to fraction form
    10,915.05/16,372.58 = 7,221.45/x
  3. Step 3: Cross multiply
    10,915.05x = 16,372.58 × 7,221.45
  4. Step 4: Simplify right side
    10,915.05x = 118,233,731.73
  5. Step 5: Solve for x
    x = 118,233,731.73/10,915.05
  6. Step 6: Final answer
    x = 10,832.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.