Home / 20,440.55-28,219.59-13,276.91

Finding the Fourth Proportional to 20,440.55, 28,219.59 and 13,276.91

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Solution

The fourth proportional to 20,440.55, 28,219.59 and 13,276.91 is: 18,329.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.55 : 28,219.59 = 13,276.91 : x
  2. Step 2: Convert to fraction form
    20,440.55/28,219.59 = 13,276.91/x
  3. Step 3: Cross multiply
    20,440.55x = 28,219.59 × 13,276.91
  4. Step 4: Simplify right side
    20,440.55x = 374,669,027.22
  5. Step 5: Solve for x
    x = 374,669,027.22/20,440.55
  6. Step 6: Final answer
    x = 18,329.69

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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.