Home / 12,590.20-18,871.26-5,185.72

Finding the Fourth Proportional to 12,590.20, 18,871.26 and 5,185.72

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Solution

The fourth proportional to 12,590.20, 18,871.26 and 5,185.72 is: 7,772.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.20 : 18,871.26 = 5,185.72 : x
  2. Step 2: Convert to fraction form
    12,590.20/18,871.26 = 5,185.72/x
  3. Step 3: Cross multiply
    12,590.20x = 18,871.26 × 5,185.72
  4. Step 4: Simplify right side
    12,590.20x = 97,861,070.41
  5. Step 5: Solve for x
    x = 97,861,070.41/12,590.20
  6. Step 6: Final answer
    x = 7,772.80

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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.