Home / 13,868.42-19,140.41-7,900.65

Finding the Fourth Proportional to 13,868.42, 19,140.41 and 7,900.65

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Solution

The fourth proportional to 13,868.42, 19,140.41 and 7,900.65 is: 10,904.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.42 : 19,140.41 = 7,900.65 : x
  2. Step 2: Convert to fraction form
    13,868.42/19,140.41 = 7,900.65/x
  3. Step 3: Cross multiply
    13,868.42x = 19,140.41 × 7,900.65
  4. Step 4: Simplify right side
    13,868.42x = 151,221,640.76
  5. Step 5: Solve for x
    x = 151,221,640.76/13,868.42
  6. Step 6: Final answer
    x = 10,904.03

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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.