Home / 13,928.42-19,220.89-7,640.74

Finding the Fourth Proportional to 13,928.42, 19,220.89 and 7,640.74

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Solution

The fourth proportional to 13,928.42, 19,220.89 and 7,640.74 is: 10,544.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.42 : 19,220.89 = 7,640.74 : x
  2. Step 2: Convert to fraction form
    13,928.42/19,220.89 = 7,640.74/x
  3. Step 3: Cross multiply
    13,928.42x = 19,220.89 × 7,640.74
  4. Step 4: Simplify right side
    13,928.42x = 146,861,823.06
  5. Step 5: Solve for x
    x = 146,861,823.06/13,928.42
  6. Step 6: Final answer
    x = 10,544.04

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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.