Home / 13,138.19-18,128.89-7,473.23

Finding the Fourth Proportional to 13,138.19, 18,128.89 and 7,473.23

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Solution

The fourth proportional to 13,138.19, 18,128.89 and 7,473.23 is: 10,312.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.19 : 18,128.89 = 7,473.23 : x
  2. Step 2: Convert to fraction form
    13,138.19/18,128.89 = 7,473.23/x
  3. Step 3: Cross multiply
    13,138.19x = 18,128.89 × 7,473.23
  4. Step 4: Simplify right side
    13,138.19x = 135,481,364.61
  5. Step 5: Solve for x
    x = 135,481,364.61/13,138.19
  6. Step 6: Final answer
    x = 10,312.03

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Half scale
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Double scale
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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.