Home / 15,513.87-21,409.09-8,440.27

Finding the Fourth Proportional to 15,513.87, 21,409.09 and 8,440.27

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Solution

The fourth proportional to 15,513.87, 21,409.09 and 8,440.27 is: 11,647.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.87 : 21,409.09 = 8,440.27 : x
  2. Step 2: Convert to fraction form
    15,513.87/21,409.09 = 8,440.27/x
  3. Step 3: Cross multiply
    15,513.87x = 21,409.09 × 8,440.27
  4. Step 4: Simplify right side
    15,513.87x = 180,698,500.05
  5. Step 5: Solve for x
    x = 180,698,500.05/15,513.87
  6. Step 6: Final answer
    x = 11,647.55

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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.