Home / 13,868.28-19,140.17-7,900.47

Finding the Fourth Proportional to 13,868.28, 19,140.17 and 7,900.47

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Solution

The fourth proportional to 13,868.28, 19,140.17 and 7,900.47 is: 10,903.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.28 : 19,140.17 = 7,900.47 : x
  2. Step 2: Convert to fraction form
    13,868.28/19,140.17 = 7,900.47/x
  3. Step 3: Cross multiply
    13,868.28x = 19,140.17 × 7,900.47
  4. Step 4: Simplify right side
    13,868.28x = 151,216,299.38
  5. Step 5: Solve for x
    x = 151,216,299.38/13,868.28
  6. Step 6: Final answer
    x = 10,903.75

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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.