Home / 15,513.92-21,409.26-8,440.34

Finding the Fourth Proportional to 15,513.92, 21,409.26 and 8,440.34

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Solution

The fourth proportional to 15,513.92, 21,409.26 and 8,440.34 is: 11,647.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.92 : 21,409.26 = 8,440.34 : x
  2. Step 2: Convert to fraction form
    15,513.92/21,409.26 = 8,440.34/x
  3. Step 3: Cross multiply
    15,513.92x = 21,409.26 × 8,440.34
  4. Step 4: Simplify right side
    15,513.92x = 180,701,433.55
  5. Step 5: Solve for x
    x = 180,701,433.55/15,513.92
  6. Step 6: Final answer
    x = 11,647.70

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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.