Home / 18,378.45-25,351.47-11,561.63

Finding the Fourth Proportional to 18,378.45, 25,351.47 and 11,561.63

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Solution

The fourth proportional to 18,378.45, 25,351.47 and 11,561.63 is: 15,948.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.45 : 25,351.47 = 11,561.63 : x
  2. Step 2: Convert to fraction form
    18,378.45/25,351.47 = 11,561.63/x
  3. Step 3: Cross multiply
    18,378.45x = 25,351.47 × 11,561.63
  4. Step 4: Simplify right side
    18,378.45x = 293,104,189.34
  5. Step 5: Solve for x
    x = 293,104,189.34/18,378.45
  6. Step 6: Final answer
    x = 15,948.25

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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.