Home / 10,087.79-13,920.95-5,611.45

Finding the Fourth Proportional to 10,087.79, 13,920.95 and 5,611.45

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Solution

The fourth proportional to 10,087.79, 13,920.95 and 5,611.45 is: 7,743.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,087.79 : 13,920.95 = 5,611.45 : x
  2. Step 2: Convert to fraction form
    10,087.79/13,920.95 = 5,611.45/x
  3. Step 3: Cross multiply
    10,087.79x = 13,920.95 × 5,611.45
  4. Step 4: Simplify right side
    10,087.79x = 78,116,652.02
  5. Step 5: Solve for x
    x = 78,116,652.02/10,087.79
  6. Step 6: Final answer
    x = 7,743.68

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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.