Home / 15,320.59-21,144.72-9,355.70

Finding the Fourth Proportional to 15,320.59, 21,144.72 and 9,355.70

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Solution

The fourth proportional to 15,320.59, 21,144.72 and 9,355.70 is: 12,912.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.59 : 21,144.72 = 9,355.70 : x
  2. Step 2: Convert to fraction form
    15,320.59/21,144.72 = 9,355.70/x
  3. Step 3: Cross multiply
    15,320.59x = 21,144.72 × 9,355.70
  4. Step 4: Simplify right side
    15,320.59x = 197,823,709.77
  5. Step 5: Solve for x
    x = 197,823,709.77/15,320.59
  6. Step 6: Final answer
    x = 12,912.28

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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.