Home / 13,869.36-19,140.78-7,901.28

Finding the Fourth Proportional to 13,869.36, 19,140.78 and 7,901.28

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Solution

The fourth proportional to 13,869.36, 19,140.78 and 7,901.28 is: 10,904.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.36 : 19,140.78 = 7,901.28 : x
  2. Step 2: Convert to fraction form
    13,869.36/19,140.78 = 7,901.28/x
  3. Step 3: Cross multiply
    13,869.36x = 19,140.78 × 7,901.28
  4. Step 4: Simplify right side
    13,869.36x = 151,236,662.20
  5. Step 5: Solve for x
    x = 151,236,662.20/13,869.36
  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.