Home / 19,812.45-29,731.56-8,578.76

Finding the Fourth Proportional to 19,812.45, 29,731.56 and 8,578.76

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Solution

The fourth proportional to 19,812.45, 29,731.56 and 8,578.76 is: 12,873.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,812.45 : 29,731.56 = 8,578.76 : x
  2. Step 2: Convert to fraction form
    19,812.45/29,731.56 = 8,578.76/x
  3. Step 3: Cross multiply
    19,812.45x = 29,731.56 × 8,578.76
  4. Step 4: Simplify right side
    19,812.45x = 255,059,991.99
  5. Step 5: Solve for x
    x = 255,059,991.99/19,812.45
  6. Step 6: Final answer
    x = 12,873.72

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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.