Home / 15,409.76-21,246.17-12,861.18

Finding the Fourth Proportional to 15,409.76, 21,246.17 and 12,861.18

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Solution

The fourth proportional to 15,409.76, 21,246.17 and 12,861.18 is: 17,732.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,409.76 : 21,246.17 = 12,861.18 : x
  2. Step 2: Convert to fraction form
    15,409.76/21,246.17 = 12,861.18/x
  3. Step 3: Cross multiply
    15,409.76x = 21,246.17 × 12,861.18
  4. Step 4: Simplify right side
    15,409.76x = 273,250,752.37
  5. Step 5: Solve for x
    x = 273,250,752.37/15,409.76
  6. Step 6: Final answer
    x = 17,732.32

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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.