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Finding the Fourth Proportional to 19,963.40, 29,945.10 and 19,671.80

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Solution

The fourth proportional to 19,963.40, 29,945.10 and 19,671.80 is: 29,507.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,963.40 : 29,945.10 = 19,671.80 : x
  2. Step 2: Convert to fraction form
    19,963.40/29,945.10 = 19,671.80/x
  3. Step 3: Cross multiply
    19,963.40x = 29,945.10 × 19,671.80
  4. Step 4: Simplify right side
    19,963.40x = 589,074,018.18
  5. Step 5: Solve for x
    x = 589,074,018.18/19,963.40
  6. Step 6: Final answer
    x = 29,507.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.