Home / 51,439.81-70,986.58-28,778.71

Finding the Fourth Proportional to 51,439.81, 70,986.58 and 28,778.71

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Solution

The fourth proportional to 51,439.81, 70,986.58 and 28,778.71 is: 39,714.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,439.81 : 70,986.58 = 28,778.71 : x
  2. Step 2: Convert to fraction form
    51,439.81/70,986.58 = 28,778.71/x
  3. Step 3: Cross multiply
    51,439.81x = 70,986.58 × 28,778.71
  4. Step 4: Simplify right side
    51,439.81x = 2,042,902,199.71
  5. Step 5: Solve for x
    x = 2,042,902,199.71/51,439.81
  6. Step 6: Final answer
    x = 39,714.42

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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.