Home / 20,400.18-28,152.99-12,436.80

Finding the Fourth Proportional to 20,400.18, 28,152.99 and 12,436.80

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Solution

The fourth proportional to 20,400.18, 28,152.99 and 12,436.80 is: 17,163.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.18 : 28,152.99 = 12,436.80 : x
  2. Step 2: Convert to fraction form
    20,400.18/28,152.99 = 12,436.80/x
  3. Step 3: Cross multiply
    20,400.18x = 28,152.99 × 12,436.80
  4. Step 4: Simplify right side
    20,400.18x = 350,133,106.03
  5. Step 5: Solve for x
    x = 350,133,106.03/20,400.18
  6. Step 6: Final answer
    x = 17,163.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.