Home / 10,639.26-14,690.79-6,864.30

Finding the Fourth Proportional to 10,639.26, 14,690.79 and 6,864.30

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Solution

The fourth proportional to 10,639.26, 14,690.79 and 6,864.30 is: 9,478.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.26 : 14,690.79 = 6,864.30 : x
  2. Step 2: Convert to fraction form
    10,639.26/14,690.79 = 6,864.30/x
  3. Step 3: Cross multiply
    10,639.26x = 14,690.79 × 6,864.30
  4. Step 4: Simplify right side
    10,639.26x = 100,841,989.80
  5. Step 5: Solve for x
    x = 100,841,989.80/10,639.26
  6. Step 6: Final answer
    x = 9,478.29

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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.