Home / 28,145.20-38,840.16-16,819.60

Finding the Fourth Proportional to 28,145.20, 38,840.16 and 16,819.60

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Solution

The fourth proportional to 28,145.20, 38,840.16 and 16,819.60 is: 23,210.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.20 : 38,840.16 = 16,819.60 : x
  2. Step 2: Convert to fraction form
    28,145.20/38,840.16 = 16,819.60/x
  3. Step 3: Cross multiply
    28,145.20x = 38,840.16 × 16,819.60
  4. Step 4: Simplify right side
    28,145.20x = 653,275,955.14
  5. Step 5: Solve for x
    x = 653,275,955.14/28,145.20
  6. Step 6: Final answer
    x = 23,210.92

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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.