Home / 13,928.47-19,221.13-7,640.84

Finding the Fourth Proportional to 13,928.47, 19,221.13 and 7,640.84

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Solution

The fourth proportional to 13,928.47, 19,221.13 and 7,640.84 is: 10,544.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.47 : 19,221.13 = 7,640.84 : x
  2. Step 2: Convert to fraction form
    13,928.47/19,221.13 = 7,640.84/x
  3. Step 3: Cross multiply
    13,928.47x = 19,221.13 × 7,640.84
  4. Step 4: Simplify right side
    13,928.47x = 146,865,636.55
  5. Step 5: Solve for x
    x = 146,865,636.55/13,928.47
  6. Step 6: Final answer
    x = 10,544.28

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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.