Home / 6,985.49-9,639.71-3,999.17

Finding the Fourth Proportional to 6,985.49, 9,639.71 and 3,999.17

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Solution

The fourth proportional to 6,985.49, 9,639.71 and 3,999.17 is: 5,518.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985.49 : 9,639.71 = 3,999.17 : x
  2. Step 2: Convert to fraction form
    6,985.49/9,639.71 = 3,999.17/x
  3. Step 3: Cross multiply
    6,985.49x = 9,639.71 × 3,999.17
  4. Step 4: Simplify right side
    6,985.49x = 38,550,858.14
  5. Step 5: Solve for x
    x = 38,550,858.14/6,985.49
  6. Step 6: Final answer
    x = 5,518.70

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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.