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Finding the Fourth Proportional to 51,323.70, 70,821.68 and 28,660.88

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Solution

The fourth proportional to 51,323.70, 70,821.68 and 28,660.88 is: 39,549.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,323.70 : 70,821.68 = 28,660.88 : x
  2. Step 2: Convert to fraction form
    51,323.70/70,821.68 = 28,660.88/x
  3. Step 3: Cross multiply
    51,323.70x = 70,821.68 × 28,660.88
  4. Step 4: Simplify right side
    51,323.70x = 2,029,811,671.88
  5. Step 5: Solve for x
    x = 2,029,811,671.88/51,323.70
  6. Step 6: Final answer
    x = 39,549.21

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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.