Home / 15,513.85-21,409.28-8,440.26

Finding the Fourth Proportional to 15,513.85, 21,409.28 and 8,440.26

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Solution

The fourth proportional to 15,513.85, 21,409.28 and 8,440.26 is: 11,647.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.85 : 21,409.28 = 8,440.26 : x
  2. Step 2: Convert to fraction form
    15,513.85/21,409.28 = 8,440.26/x
  3. Step 3: Cross multiply
    15,513.85x = 21,409.28 × 8,440.26
  4. Step 4: Simplify right side
    15,513.85x = 180,699,889.61
  5. Step 5: Solve for x
    x = 180,699,889.61/15,513.85
  6. Step 6: Final answer
    x = 11,647.65

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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.