Home / 11,391.29-15,720.68-6,355.52

Finding the Fourth Proportional to 11,391.29, 15,720.68 and 6,355.52

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Solution

The fourth proportional to 11,391.29, 15,720.68 and 6,355.52 is: 8,771.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.29 : 15,720.68 = 6,355.52 : x
  2. Step 2: Convert to fraction form
    11,391.29/15,720.68 = 6,355.52/x
  3. Step 3: Cross multiply
    11,391.29x = 15,720.68 × 6,355.52
  4. Step 4: Simplify right side
    11,391.29x = 99,912,985.77
  5. Step 5: Solve for x
    x = 99,912,985.77/11,391.29
  6. Step 6: Final answer
    x = 8,771.00

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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.