Home / 18,905.32-28,359.42-5,758.72

Finding the Fourth Proportional to 18,905.32, 28,359.42 and 5,758.72

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Solution

The fourth proportional to 18,905.32, 28,359.42 and 5,758.72 is: 8,638.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.32 : 28,359.42 = 5,758.72 : x
  2. Step 2: Convert to fraction form
    18,905.32/28,359.42 = 5,758.72/x
  3. Step 3: Cross multiply
    18,905.32x = 28,359.42 × 5,758.72
  4. Step 4: Simplify right side
    18,905.32x = 163,313,959.14
  5. Step 5: Solve for x
    x = 163,313,959.14/18,905.32
  6. Step 6: Final answer
    x = 8,638.52

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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.