Home / 13,130.19-18,119.70-7,464.78

Finding the Fourth Proportional to 13,130.19, 18,119.70 and 7,464.78

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Solution

The fourth proportional to 13,130.19, 18,119.70 and 7,464.78 is: 10,301.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.19 : 18,119.70 = 7,464.78 : x
  2. Step 2: Convert to fraction form
    13,130.19/18,119.70 = 7,464.78/x
  3. Step 3: Cross multiply
    13,130.19x = 18,119.70 × 7,464.78
  4. Step 4: Simplify right side
    13,130.19x = 135,259,574.17
  5. Step 5: Solve for x
    x = 135,259,574.17/13,130.19
  6. Step 6: Final answer
    x = 10,301.42

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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.