Home / 10,515.64-15,771.02-3,118.31

Finding the Fourth Proportional to 10,515.64, 15,771.02 and 3,118.31

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Solution

The fourth proportional to 10,515.64, 15,771.02 and 3,118.31 is: 4,676.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.64 : 15,771.02 = 3,118.31 : x
  2. Step 2: Convert to fraction form
    10,515.64/15,771.02 = 3,118.31/x
  3. Step 3: Cross multiply
    10,515.64x = 15,771.02 × 3,118.31
  4. Step 4: Simplify right side
    10,515.64x = 49,178,929.38
  5. Step 5: Solve for x
    x = 49,178,929.38/10,515.64
  6. Step 6: Final answer
    x = 4,676.74

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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.