Home / 13,890.56-19,170.72-7,923.20

Finding the Fourth Proportional to 13,890.56, 19,170.72 and 7,923.20

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Solution

The fourth proportional to 13,890.56, 19,170.72 and 7,923.20 is: 10,935.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.56 : 19,170.72 = 7,923.20 : x
  2. Step 2: Convert to fraction form
    13,890.56/19,170.72 = 7,923.20/x
  3. Step 3: Cross multiply
    13,890.56x = 19,170.72 × 7,923.20
  4. Step 4: Simplify right side
    13,890.56x = 151,893,448.70
  5. Step 5: Solve for x
    x = 151,893,448.70/13,890.56
  6. Step 6: Final answer
    x = 10,935.01

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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.