Home / 15,216.85-21,025.82-12,559.65

Finding the Fourth Proportional to 15,216.85, 21,025.82 and 12,559.65

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Solution

The fourth proportional to 15,216.85, 21,025.82 and 12,559.65 is: 17,354.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,216.85 : 21,025.82 = 12,559.65 : x
  2. Step 2: Convert to fraction form
    15,216.85/21,025.82 = 12,559.65/x
  3. Step 3: Cross multiply
    15,216.85x = 21,025.82 × 12,559.65
  4. Step 4: Simplify right side
    15,216.85x = 264,076,940.16
  5. Step 5: Solve for x
    x = 264,076,940.16/15,216.85
  6. Step 6: Final answer
    x = 17,354.24

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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.