Home / 13,928.13-19,220.76-7,640.37

Finding the Fourth Proportional to 13,928.13, 19,220.76 and 7,640.37

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Solution

The fourth proportional to 13,928.13, 19,220.76 and 7,640.37 is: 10,543.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.13 : 19,220.76 = 7,640.37 : x
  2. Step 2: Convert to fraction form
    13,928.13/19,220.76 = 7,640.37/x
  3. Step 3: Cross multiply
    13,928.13x = 19,220.76 × 7,640.37
  4. Step 4: Simplify right side
    13,928.13x = 146,853,718.08
  5. Step 5: Solve for x
    x = 146,853,718.08/13,928.13
  6. Step 6: Final answer
    x = 10,543.68

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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.