Home / 10,558.10-15,820.74-3,980.70

Finding the Fourth Proportional to 10,558.10, 15,820.74 and 3,980.70

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Solution

The fourth proportional to 10,558.10, 15,820.74 and 3,980.70 is: 5,964.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,558.10 : 15,820.74 = 3,980.70 : x
  2. Step 2: Convert to fraction form
    10,558.10/15,820.74 = 3,980.70/x
  3. Step 3: Cross multiply
    10,558.10x = 15,820.74 × 3,980.70
  4. Step 4: Simplify right side
    10,558.10x = 62,977,619.72
  5. Step 5: Solve for x
    x = 62,977,619.72/10,558.10
  6. Step 6: Final answer
    x = 5,964.86

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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.