Home / 28,181.20-38,892.08-15,606.80

Finding the Fourth Proportional to 28,181.20, 38,892.08 and 15,606.80

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Solution

The fourth proportional to 28,181.20, 38,892.08 and 15,606.80 is: 21,538.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.20 : 38,892.08 = 15,606.80 : x
  2. Step 2: Convert to fraction form
    28,181.20/38,892.08 = 15,606.80/x
  3. Step 3: Cross multiply
    28,181.20x = 38,892.08 × 15,606.80
  4. Step 4: Simplify right side
    28,181.20x = 606,980,914.14
  5. Step 5: Solve for x
    x = 606,980,914.14/28,181.20
  6. Step 6: Final answer
    x = 21,538.50

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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.