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Finding the Fourth Proportional to 19,893.80, 29,862.30 and 12,506.60

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Solution

The fourth proportional to 19,893.80, 29,862.30 and 12,506.60 is: 18,773.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,893.80 : 29,862.30 = 12,506.60 : x
  2. Step 2: Convert to fraction form
    19,893.80/29,862.30 = 12,506.60/x
  3. Step 3: Cross multiply
    19,893.80x = 29,862.30 × 12,506.60
  4. Step 4: Simplify right side
    19,893.80x = 373,475,841.18
  5. Step 5: Solve for x
    x = 373,475,841.18/19,893.80
  6. Step 6: Final answer
    x = 18,773.48

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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.