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Finding the Fourth Proportional to 12,471.88, 18,710.90 and 3,706.76

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Solution

The fourth proportional to 12,471.88, 18,710.90 and 3,706.76 is: 5,561.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,471.88 : 18,710.90 = 3,706.76 : x
  2. Step 2: Convert to fraction form
    12,471.88/18,710.90 = 3,706.76/x
  3. Step 3: Cross multiply
    12,471.88x = 18,710.90 × 3,706.76
  4. Step 4: Simplify right side
    12,471.88x = 69,356,703.60
  5. Step 5: Solve for x
    x = 69,356,703.60/12,471.88
  6. Step 6: Final answer
    x = 5,561.05

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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.