Home / 10,087.55-13,920.89-5,611.35

Finding the Fourth Proportional to 10,087.55, 13,920.89 and 5,611.35

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Solution

The fourth proportional to 10,087.55, 13,920.89 and 5,611.35 is: 7,743.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,087.55 : 13,920.89 = 5,611.35 : x
  2. Step 2: Convert to fraction form
    10,087.55/13,920.89 = 5,611.35/x
  3. Step 3: Cross multiply
    10,087.55x = 13,920.89 × 5,611.35
  4. Step 4: Simplify right side
    10,087.55x = 78,114,986.10
  5. Step 5: Solve for x
    x = 78,114,986.10/10,087.55
  6. Step 6: Final answer
    x = 7,743.70

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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.