Home / 15,475.30-21,355.78-8,401.72

Finding the Fourth Proportional to 15,475.30, 21,355.78 and 8,401.72

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Solution

The fourth proportional to 15,475.30, 21,355.78 and 8,401.72 is: 11,594.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,475.30 : 21,355.78 = 8,401.72 : x
  2. Step 2: Convert to fraction form
    15,475.30/21,355.78 = 8,401.72/x
  3. Step 3: Cross multiply
    15,475.30x = 21,355.78 × 8,401.72
  4. Step 4: Simplify right side
    15,475.30x = 179,425,283.94
  5. Step 5: Solve for x
    x = 179,425,283.94/15,475.30
  6. Step 6: Final answer
    x = 11,594.30

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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.