Home / 10,087.19-13,920.28-5,611.40

Finding the Fourth Proportional to 10,087.19, 13,920.28 and 5,611.40

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Solution

The fourth proportional to 10,087.19, 13,920.28 and 5,611.40 is: 7,743.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,087.19 : 13,920.28 = 5,611.40 : x
  2. Step 2: Convert to fraction form
    10,087.19/13,920.28 = 5,611.40/x
  3. Step 3: Cross multiply
    10,087.19x = 13,920.28 × 5,611.40
  4. Step 4: Simplify right side
    10,087.19x = 78,112,259.19
  5. Step 5: Solve for x
    x = 78,112,259.19/10,087.19
  6. Step 6: Final answer
    x = 7,743.71

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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.