Home / 15,384.60-21,231.04-9,015.78

Finding the Fourth Proportional to 15,384.60, 21,231.04 and 9,015.78

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Solution

The fourth proportional to 15,384.60, 21,231.04 and 9,015.78 is: 12,441.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,384.60 : 21,231.04 = 9,015.78 : x
  2. Step 2: Convert to fraction form
    15,384.60/21,231.04 = 9,015.78/x
  3. Step 3: Cross multiply
    15,384.60x = 21,231.04 × 9,015.78
  4. Step 4: Simplify right side
    15,384.60x = 191,414,385.81
  5. Step 5: Solve for x
    x = 191,414,385.81/15,384.60
  6. Step 6: Final answer
    x = 12,441.95

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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.