Home / 11,820.78-16,312.64-6,515.48

Finding the Fourth Proportional to 11,820.78, 16,312.64 and 6,515.48

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Solution

The fourth proportional to 11,820.78, 16,312.64 and 6,515.48 is: 8,991.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.78 : 16,312.64 = 6,515.48 : x
  2. Step 2: Convert to fraction form
    11,820.78/16,312.64 = 6,515.48/x
  3. Step 3: Cross multiply
    11,820.78x = 16,312.64 × 6,515.48
  4. Step 4: Simplify right side
    11,820.78x = 106,284,679.67
  5. Step 5: Solve for x
    x = 106,284,679.67/11,820.78
  6. Step 6: Final answer
    x = 8,991.34

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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.