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Finding the Fourth Proportional to 13,868.48, 20,803.44 and 3,480.32

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Solution

The fourth proportional to 13,868.48, 20,803.44 and 3,480.32 is: 5,220.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.48 : 20,803.44 = 3,480.32 : x
  2. Step 2: Convert to fraction form
    13,868.48/20,803.44 = 3,480.32/x
  3. Step 3: Cross multiply
    13,868.48x = 20,803.44 × 3,480.32
  4. Step 4: Simplify right side
    13,868.48x = 72,402,628.30
  5. Step 5: Solve for x
    x = 72,402,628.30/13,868.48
  6. Step 6: Final answer
    x = 5,220.66

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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.