Home / 11,820.50-16,312.09-6,515.21

Finding the Fourth Proportional to 11,820.50, 16,312.09 and 6,515.21

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Solution

The fourth proportional to 11,820.50, 16,312.09 and 6,515.21 is: 8,990.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.50 : 16,312.09 = 6,515.21 : x
  2. Step 2: Convert to fraction form
    11,820.50/16,312.09 = 6,515.21/x
  3. Step 3: Cross multiply
    11,820.50x = 16,312.09 × 6,515.21
  4. Step 4: Simplify right side
    11,820.50x = 106,276,691.89
  5. Step 5: Solve for x
    x = 106,276,691.89/11,820.50
  6. Step 6: Final answer
    x = 8,990.88

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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.