Home / 13,278.47-18,325.37-7,613.75

Finding the Fourth Proportional to 13,278.47, 18,325.37 and 7,613.75

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Solution

The fourth proportional to 13,278.47, 18,325.37 and 7,613.75 is: 10,507.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.47 : 18,325.37 = 7,613.75 : x
  2. Step 2: Convert to fraction form
    13,278.47/18,325.37 = 7,613.75/x
  3. Step 3: Cross multiply
    13,278.47x = 18,325.37 × 7,613.75
  4. Step 4: Simplify right side
    13,278.47x = 139,524,719.84
  5. Step 5: Solve for x
    x = 139,524,719.84/13,278.47
  6. Step 6: Final answer
    x = 10,507.59

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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.