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Finding the Fourth Proportional to 29,986.20, 39,908.70 and 29,986.20

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Solution

The fourth proportional to 29,986.20, 39,908.70 and 29,986.20 is: 39,908.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,986.20 : 39,908.70 = 29,986.20 : x
  2. Step 2: Convert to fraction form
    29,986.20/39,908.70 = 29,986.20/x
  3. Step 3: Cross multiply
    29,986.20x = 39,908.70 × 29,986.20
  4. Step 4: Simplify right side
    29,986.20x = 1,196,710,259.94
  5. Step 5: Solve for x
    x = 1,196,710,259.94/29,986.20
  6. Step 6: Final answer
    x = 39,908.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.