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Finding the Fourth Proportional to 29,901.90, 40,965.80 and 28,780.86

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Solution

The fourth proportional to 29,901.90, 40,965.80 and 28,780.86 is: 39,429.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,901.90 : 40,965.80 = 28,780.86 : x
  2. Step 2: Convert to fraction form
    29,901.90/40,965.80 = 28,780.86/x
  3. Step 3: Cross multiply
    29,901.90x = 40,965.80 × 28,780.86
  4. Step 4: Simplify right side
    29,901.90x = 1,179,030,954.59
  5. Step 5: Solve for x
    x = 1,179,030,954.59/29,901.90
  6. Step 6: Final answer
    x = 39,429.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.