Home / 15,621.05-21,559.67-12,289.29

Finding the Fourth Proportional to 15,621.05, 21,559.67 and 12,289.29

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Solution

The fourth proportional to 15,621.05, 21,559.67 and 12,289.29 is: 16,961.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.05 : 21,559.67 = 12,289.29 : x
  2. Step 2: Convert to fraction form
    15,621.05/21,559.67 = 12,289.29/x
  3. Step 3: Cross multiply
    15,621.05x = 21,559.67 × 12,289.29
  4. Step 4: Simplify right side
    15,621.05x = 264,952,975.49
  5. Step 5: Solve for x
    x = 264,952,975.49/15,621.05
  6. Step 6: Final answer
    x = 16,961.28

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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.