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Finding the Fourth Proportional to 19,986.70, 29,980.05 and 16,228.30

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Solution

The fourth proportional to 19,986.70, 29,980.05 and 16,228.30 is: 24,342.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.70 : 29,980.05 = 16,228.30 : x
  2. Step 2: Convert to fraction form
    19,986.70/29,980.05 = 16,228.30/x
  3. Step 3: Cross multiply
    19,986.70x = 29,980.05 × 16,228.30
  4. Step 4: Simplify right side
    19,986.70x = 486,525,245.42
  5. Step 5: Solve for x
    x = 486,525,245.42/19,986.70
  6. Step 6: Final answer
    x = 24,342.45

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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.