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Finding the Fourth Proportional to 19,900.80, 29,851.20 and 16,012.80

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Solution

The fourth proportional to 19,900.80, 29,851.20 and 16,012.80 is: 24,019.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,900.80 : 29,851.20 = 16,012.80 : x
  2. Step 2: Convert to fraction form
    19,900.80/29,851.20 = 16,012.80/x
  3. Step 3: Cross multiply
    19,900.80x = 29,851.20 × 16,012.80
  4. Step 4: Simplify right side
    19,900.80x = 478,001,295.36
  5. Step 5: Solve for x
    x = 478,001,295.36/19,900.80
  6. Step 6: Final answer
    x = 24,019.20

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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.