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Finding the Fourth Proportional to 19,456.80, 29,206.80 and 12,069.60

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Solution

The fourth proportional to 19,456.80, 29,206.80 and 12,069.60 is: 18,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,456.80 : 29,206.80 = 12,069.60 : x
  2. Step 2: Convert to fraction form
    19,456.80/29,206.80 = 12,069.60/x
  3. Step 3: Cross multiply
    19,456.80x = 29,206.80 × 12,069.60
  4. Step 4: Simplify right side
    19,456.80x = 352,514,393.28
  5. Step 5: Solve for x
    x = 352,514,393.28/19,456.80
  6. Step 6: Final answer
    x = 18,117.80

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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.