Home / 15,063.38-20,789.72-8,688.78

Finding the Fourth Proportional to 15,063.38, 20,789.72 and 8,688.78

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Solution

The fourth proportional to 15,063.38, 20,789.72 and 8,688.78 is: 11,991.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,063.38 : 20,789.72 = 8,688.78 : x
  2. Step 2: Convert to fraction form
    15,063.38/20,789.72 = 8,688.78/x
  3. Step 3: Cross multiply
    15,063.38x = 20,789.72 × 8,688.78
  4. Step 4: Simplify right side
    15,063.38x = 180,637,303.34
  5. Step 5: Solve for x
    x = 180,637,303.34/15,063.38
  6. Step 6: Final answer
    x = 11,991.82

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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.