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Finding the Fourth Proportional to 13,220.80, 19,798.80 and 8,814.40

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Solution

The fourth proportional to 13,220.80, 19,798.80 and 8,814.40 is: 13,200.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.80 : 19,798.80 = 8,814.40 : x
  2. Step 2: Convert to fraction form
    13,220.80/19,798.80 = 8,814.40/x
  3. Step 3: Cross multiply
    13,220.80x = 19,798.80 × 8,814.40
  4. Step 4: Simplify right side
    13,220.80x = 174,514,542.72
  5. Step 5: Solve for x
    x = 174,514,542.72/13,220.80
  6. Step 6: Final answer
    x = 13,200.00

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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.