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Finding the Fourth Proportional to 19,963.80, 29,921.40 and 8,858.70

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Solution

The fourth proportional to 19,963.80, 29,921.40 and 8,858.70 is: 13,277.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,963.80 : 29,921.40 = 8,858.70 : x
  2. Step 2: Convert to fraction form
    19,963.80/29,921.40 = 8,858.70/x
  3. Step 3: Cross multiply
    19,963.80x = 29,921.40 × 8,858.70
  4. Step 4: Simplify right side
    19,963.80x = 265,064,706.18
  5. Step 5: Solve for x
    x = 265,064,706.18/19,963.80
  6. Step 6: Final answer
    x = 13,277.27

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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.