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Finding the Fourth Proportional to 43,145.46, 64,715.22 and 11,555.46

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Solution

The fourth proportional to 43,145.46, 64,715.22 and 11,555.46 is: 17,332.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,145.46 : 64,715.22 = 11,555.46 : x
  2. Step 2: Convert to fraction form
    43,145.46/64,715.22 = 11,555.46/x
  3. Step 3: Cross multiply
    43,145.46x = 64,715.22 × 11,555.46
  4. Step 4: Simplify right side
    43,145.46x = 747,814,136.10
  5. Step 5: Solve for x
    x = 747,814,136.10/43,145.46
  6. Step 6: Final answer
    x = 17,332.39

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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.