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Finding the Fourth Proportional to 6,917.97, 9,547.87 and 4,085.65

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Solution

The fourth proportional to 6,917.97, 9,547.87 and 4,085.65 is: 5,638.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,917.97 : 9,547.87 = 4,085.65 : x
  2. Step 2: Convert to fraction form
    6,917.97/9,547.87 = 4,085.65/x
  3. Step 3: Cross multiply
    6,917.97x = 9,547.87 × 4,085.65
  4. Step 4: Simplify right side
    6,917.97x = 39,009,284.04
  5. Step 5: Solve for x
    x = 39,009,284.04/6,917.97
  6. Step 6: Final answer
    x = 5,638.83

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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.