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Finding the Fourth Proportional to 18,359.61, 25,314.08 and 15,521.99

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Solution

The fourth proportional to 18,359.61, 25,314.08 and 15,521.99 is: 21,401.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,359.61 : 25,314.08 = 15,521.99 : x
  2. Step 2: Convert to fraction form
    18,359.61/25,314.08 = 15,521.99/x
  3. Step 3: Cross multiply
    18,359.61x = 25,314.08 × 15,521.99
  4. Step 4: Simplify right side
    18,359.61x = 392,924,692.44
  5. Step 5: Solve for x
    x = 392,924,692.44/18,359.61
  6. Step 6: Final answer
    x = 21,401.58

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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.