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Finding the Fourth Proportional to 11,810.10, 17,715.15 and 6,615.30

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Solution

The fourth proportional to 11,810.10, 17,715.15 and 6,615.30 is: 9,922.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,810.10 : 17,715.15 = 6,615.30 : x
  2. Step 2: Convert to fraction form
    11,810.10/17,715.15 = 6,615.30/x
  3. Step 3: Cross multiply
    11,810.10x = 17,715.15 × 6,615.30
  4. Step 4: Simplify right side
    11,810.10x = 117,191,031.80
  5. Step 5: Solve for x
    x = 117,191,031.80/11,810.10
  6. Step 6: Final answer
    x = 9,922.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.