Home / 13,865.13-19,137.28-7,900.32

Finding the Fourth Proportional to 13,865.13, 19,137.28 and 7,900.32

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Solution

The fourth proportional to 13,865.13, 19,137.28 and 7,900.32 is: 10,904.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,865.13 : 19,137.28 = 7,900.32 : x
  2. Step 2: Convert to fraction form
    13,865.13/19,137.28 = 7,900.32/x
  3. Step 3: Cross multiply
    13,865.13x = 19,137.28 × 7,900.32
  4. Step 4: Simplify right side
    13,865.13x = 151,190,540.24
  5. Step 5: Solve for x
    x = 151,190,540.24/13,865.13
  6. Step 6: Final answer
    x = 10,904.37

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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.