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Finding the Fourth Proportional to 34,507.81, 51,750.71 and 11,128.78

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Solution

The fourth proportional to 34,507.81, 51,750.71 and 11,128.78 is: 16,689.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,507.81 : 51,750.71 = 11,128.78 : x
  2. Step 2: Convert to fraction form
    34,507.81/51,750.71 = 11,128.78/x
  3. Step 3: Cross multiply
    34,507.81x = 51,750.71 × 11,128.78
  4. Step 4: Simplify right side
    34,507.81x = 575,922,266.43
  5. Step 5: Solve for x
    x = 575,922,266.43/34,507.81
  6. Step 6: Final answer
    x = 16,689.62

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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.