Home / 8,736.78-12,068.55-6,980.70

Finding the Fourth Proportional to 8,736.78, 12,068.55 and 6,980.70

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Solution

The fourth proportional to 8,736.78, 12,068.55 and 6,980.70 is: 9,642.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,736.78 : 12,068.55 = 6,980.70 : x
  2. Step 2: Convert to fraction form
    8,736.78/12,068.55 = 6,980.70/x
  3. Step 3: Cross multiply
    8,736.78x = 12,068.55 × 6,980.70
  4. Step 4: Simplify right side
    8,736.78x = 84,246,926.99
  5. Step 5: Solve for x
    x = 84,246,926.99/8,736.78
  6. Step 6: Final answer
    x = 9,642.79

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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.