Home / 20,461.38-30,688.64-5,671.78

Finding the Fourth Proportional to 20,461.38, 30,688.64 and 5,671.78

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Solution

The fourth proportional to 20,461.38, 30,688.64 and 5,671.78 is: 8,506.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,461.38 : 30,688.64 = 5,671.78 : x
  2. Step 2: Convert to fraction form
    20,461.38/30,688.64 = 5,671.78/x
  3. Step 3: Cross multiply
    20,461.38x = 30,688.64 × 5,671.78
  4. Step 4: Simplify right side
    20,461.38x = 174,059,214.58
  5. Step 5: Solve for x
    x = 174,059,214.58/20,461.38
  6. Step 6: Final answer
    x = 8,506.72

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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.