Home / 15,354.45-21,181.63-9,375.78

Finding the Fourth Proportional to 15,354.45, 21,181.63 and 9,375.78

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Solution

The fourth proportional to 15,354.45, 21,181.63 and 9,375.78 is: 12,933.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,354.45 : 21,181.63 = 9,375.78 : x
  2. Step 2: Convert to fraction form
    15,354.45/21,181.63 = 9,375.78/x
  3. Step 3: Cross multiply
    15,354.45x = 21,181.63 × 9,375.78
  4. Step 4: Simplify right side
    15,354.45x = 198,594,217.63
  5. Step 5: Solve for x
    x = 198,594,217.63/15,354.45
  6. Step 6: Final answer
    x = 12,933.98

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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.