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Finding the Fourth Proportional to 13,953.98, 20,840.65 and 12,635.10

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Solution

The fourth proportional to 13,953.98, 20,840.65 and 12,635.10 is: 18,870.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.98 : 20,840.65 = 12,635.10 : x
  2. Step 2: Convert to fraction form
    13,953.98/20,840.65 = 12,635.10/x
  3. Step 3: Cross multiply
    13,953.98x = 20,840.65 × 12,635.10
  4. Step 4: Simplify right side
    13,953.98x = 263,323,673.53
  5. Step 5: Solve for x
    x = 263,323,673.53/13,953.98
  6. Step 6: Final answer
    x = 18,870.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.