Home / 15,420.90-23,131.44-4,890.72

Finding the Fourth Proportional to 15,420.90, 23,131.44 and 4,890.72

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Solution

The fourth proportional to 15,420.90, 23,131.44 and 4,890.72 is: 7,336.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.90 : 23,131.44 = 4,890.72 : x
  2. Step 2: Convert to fraction form
    15,420.90/23,131.44 = 4,890.72/x
  3. Step 3: Cross multiply
    15,420.90x = 23,131.44 × 4,890.72
  4. Step 4: Simplify right side
    15,420.90x = 113,129,396.24
  5. Step 5: Solve for x
    x = 113,129,396.24/15,420.90
  6. Step 6: Final answer
    x = 7,336.11

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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.