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Finding the Fourth Proportional to 51,424.71, 70,969.73 and 28,765.82

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Solution

The fourth proportional to 51,424.71, 70,969.73 and 28,765.82 is: 39,698.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,424.71 : 70,969.73 = 28,765.82 : x
  2. Step 2: Convert to fraction form
    51,424.71/70,969.73 = 28,765.82/x
  3. Step 3: Cross multiply
    51,424.71x = 70,969.73 × 28,765.82
  4. Step 4: Simplify right side
    51,424.71x = 2,041,502,478.63
  5. Step 5: Solve for x
    x = 2,041,502,478.63/51,424.71
  6. Step 6: Final answer
    x = 39,698.86

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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.