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Finding the Fourth Proportional to 51,455.70, 71,012.16 and 28,797.30

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Solution

The fourth proportional to 51,455.70, 71,012.16 and 28,797.30 is: 39,742.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,455.70 : 71,012.16 = 28,797.30 : x
  2. Step 2: Convert to fraction form
    51,455.70/71,012.16 = 28,797.30/x
  3. Step 3: Cross multiply
    51,455.70x = 71,012.16 × 28,797.30
  4. Step 4: Simplify right side
    51,455.70x = 2,044,958,475.17
  5. Step 5: Solve for x
    x = 2,044,958,475.17/51,455.70
  6. Step 6: Final answer
    x = 39,742.12

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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.