Home / 11,513.75-15,887.88-6,478.16

Finding the Fourth Proportional to 11,513.75, 15,887.88 and 6,478.16

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Solution

The fourth proportional to 11,513.75, 15,887.88 and 6,478.16 is: 8,939.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,513.75 : 15,887.88 = 6,478.16 : x
  2. Step 2: Convert to fraction form
    11,513.75/15,887.88 = 6,478.16/x
  3. Step 3: Cross multiply
    11,513.75x = 15,887.88 × 6,478.16
  4. Step 4: Simplify right side
    11,513.75x = 102,924,149.26
  5. Step 5: Solve for x
    x = 102,924,149.26/11,513.75
  6. Step 6: Final answer
    x = 8,939.24

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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.