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Finding the Fourth Proportional to 24,012.80, 36,019.20 and 20,124.80

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Solution

The fourth proportional to 24,012.80, 36,019.20 and 20,124.80 is: 30,187.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    24,012.80 : 36,019.20 = 20,124.80 : x
  2. Step 2: Convert to fraction form
    24,012.80/36,019.20 = 20,124.80/x
  3. Step 3: Cross multiply
    24,012.80x = 36,019.20 × 20,124.80
  4. Step 4: Simplify right side
    24,012.80x = 724,879,196.16
  5. Step 5: Solve for x
    x = 724,879,196.16/24,012.80
  6. Step 6: Final answer
    x = 30,187.20

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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.