Home / 10,122.40-13,965.60-5,645.32

Finding the Fourth Proportional to 10,122.40, 13,965.60 and 5,645.32

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Solution

The fourth proportional to 10,122.40, 13,965.60 and 5,645.32 is: 7,788.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,122.40 : 13,965.60 = 5,645.32 : x
  2. Step 2: Convert to fraction form
    10,122.40/13,965.60 = 5,645.32/x
  3. Step 3: Cross multiply
    10,122.40x = 13,965.60 × 5,645.32
  4. Step 4: Simplify right side
    10,122.40x = 78,840,280.99
  5. Step 5: Solve for x
    x = 78,840,280.99/10,122.40
  6. Step 6: Final answer
    x = 7,788.69

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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.