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Finding the Fourth Proportional to 19,807.60, 29,711.40 and 19,418.80

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Solution

The fourth proportional to 19,807.60, 29,711.40 and 19,418.80 is: 29,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,807.60 : 29,711.40 = 19,418.80 : x
  2. Step 2: Convert to fraction form
    19,807.60/29,711.40 = 19,418.80/x
  3. Step 3: Cross multiply
    19,807.60x = 29,711.40 × 19,418.80
  4. Step 4: Simplify right side
    19,807.60x = 576,959,734.32
  5. Step 5: Solve for x
    x = 576,959,734.32/19,807.60
  6. Step 6: Final answer
    x = 29,128.20

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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.