Home / 13,869.78-19,140.41-7,901.35

Finding the Fourth Proportional to 13,869.78, 19,140.41 and 7,901.35

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Solution

The fourth proportional to 13,869.78, 19,140.41 and 7,901.35 is: 10,903.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.78 : 19,140.41 = 7,901.35 : x
  2. Step 2: Convert to fraction form
    13,869.78/19,140.41 = 7,901.35/x
  3. Step 3: Cross multiply
    13,869.78x = 19,140.41 × 7,901.35
  4. Step 4: Simplify right side
    13,869.78x = 151,235,078.55
  5. Step 5: Solve for x
    x = 151,235,078.55/13,869.78
  6. Step 6: Final answer
    x = 10,903.93

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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.