Home / 10,639.84-15,943.56-5,085.55

Finding the Fourth Proportional to 10,639.84, 15,943.56 and 5,085.55

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Solution

The fourth proportional to 10,639.84, 15,943.56 and 5,085.55 is: 7,620.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.84 : 15,943.56 = 5,085.55 : x
  2. Step 2: Convert to fraction form
    10,639.84/15,943.56 = 5,085.55/x
  3. Step 3: Cross multiply
    10,639.84x = 15,943.56 × 5,085.55
  4. Step 4: Simplify right side
    10,639.84x = 81,081,771.56
  5. Step 5: Solve for x
    x = 81,081,771.56/10,639.84
  6. Step 6: Final answer
    x = 7,620.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.