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Finding the Fourth Proportional to 14,129.80, 19,499.36 and 7,756.98

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Solution

The fourth proportional to 14,129.80, 19,499.36 and 7,756.98 is: 10,704.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,129.80 : 19,499.36 = 7,756.98 : x
  2. Step 2: Convert to fraction form
    14,129.80/19,499.36 = 7,756.98/x
  3. Step 3: Cross multiply
    14,129.80x = 19,499.36 × 7,756.98
  4. Step 4: Simplify right side
    14,129.80x = 151,256,145.53
  5. Step 5: Solve for x
    x = 151,256,145.53/14,129.80
  6. Step 6: Final answer
    x = 10,704.76

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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.