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Finding the Fourth Proportional to 18,425.77, 25,401.80 and 15,581.72

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Solution

The fourth proportional to 18,425.77, 25,401.80 and 15,581.72 is: 21,480.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425.77 : 25,401.80 = 15,581.72 : x
  2. Step 2: Convert to fraction form
    18,425.77/25,401.80 = 15,581.72/x
  3. Step 3: Cross multiply
    18,425.77x = 25,401.80 × 15,581.72
  4. Step 4: Simplify right side
    18,425.77x = 395,803,720.69
  5. Step 5: Solve for x
    x = 395,803,720.69/18,425.77
  6. Step 6: Final answer
    x = 21,480.99

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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.