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Finding the Fourth Proportional to 14,485.70, 21,728.55 and 10,031.30

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Solution

The fourth proportional to 14,485.70, 21,728.55 and 10,031.30 is: 15,046.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,485.70 : 21,728.55 = 10,031.30 : x
  2. Step 2: Convert to fraction form
    14,485.70/21,728.55 = 10,031.30/x
  3. Step 3: Cross multiply
    14,485.70x = 21,728.55 × 10,031.30
  4. Step 4: Simplify right side
    14,485.70x = 217,965,603.62
  5. Step 5: Solve for x
    x = 217,965,603.62/14,485.70
  6. Step 6: Final answer
    x = 15,046.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.