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Finding the Fourth Proportional to 8,720.58, 12,040.19 and 6,700.39

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Solution

The fourth proportional to 8,720.58, 12,040.19 and 6,700.39 is: 9,250.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.58 : 12,040.19 = 6,700.39 : x
  2. Step 2: Convert to fraction form
    8,720.58/12,040.19 = 6,700.39/x
  3. Step 3: Cross multiply
    8,720.58x = 12,040.19 × 6,700.39
  4. Step 4: Simplify right side
    8,720.58x = 80,673,968.67
  5. Step 5: Solve for x
    x = 80,673,968.67/8,720.58
  6. Step 6: Final answer
    x = 9,250.99

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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.