Home / 20,378.25-28,095.66-13,195.40

Finding the Fourth Proportional to 20,378.25, 28,095.66 and 13,195.40

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Solution

The fourth proportional to 20,378.25, 28,095.66 and 13,195.40 is: 18,192.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.25 : 28,095.66 = 13,195.40 : x
  2. Step 2: Convert to fraction form
    20,378.25/28,095.66 = 13,195.40/x
  3. Step 3: Cross multiply
    20,378.25x = 28,095.66 × 13,195.40
  4. Step 4: Simplify right side
    20,378.25x = 370,733,331.49
  5. Step 5: Solve for x
    x = 370,733,331.49/20,378.25
  6. Step 6: Final answer
    x = 18,192.60

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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.