Home / 15,412.10-21,270.80-8,700.44

Finding the Fourth Proportional to 15,412.10, 21,270.80 and 8,700.44

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Solution

The fourth proportional to 15,412.10, 21,270.80 and 8,700.44 is: 12,007.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,412.10 : 21,270.80 = 8,700.44 : x
  2. Step 2: Convert to fraction form
    15,412.10/21,270.80 = 8,700.44/x
  3. Step 3: Cross multiply
    15,412.10x = 21,270.80 × 8,700.44
  4. Step 4: Simplify right side
    15,412.10x = 185,065,234.55
  5. Step 5: Solve for x
    x = 185,065,234.55/15,412.10
  6. Step 6: Final answer
    x = 12,007.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.