Home / 20,508.78-30,762.24-5,717.40

Finding the Fourth Proportional to 20,508.78, 30,762.24 and 5,717.40

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Solution

The fourth proportional to 20,508.78, 30,762.24 and 5,717.40 is: 8,575.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.78 : 30,762.24 = 5,717.40 : x
  2. Step 2: Convert to fraction form
    20,508.78/30,762.24 = 5,717.40/x
  3. Step 3: Cross multiply
    20,508.78x = 30,762.24 × 5,717.40
  4. Step 4: Simplify right side
    20,508.78x = 175,880,030.98
  5. Step 5: Solve for x
    x = 175,880,030.98/20,508.78
  6. Step 6: Final answer
    x = 8,575.84

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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.