Home / 15,509.10-21,401.49-8,435.37

Finding the Fourth Proportional to 15,509.10, 21,401.49 and 8,435.37

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Solution

The fourth proportional to 15,509.10, 21,401.49 and 8,435.37 is: 11,640.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.10 : 21,401.49 = 8,435.37 : x
  2. Step 2: Convert to fraction form
    15,509.10/21,401.49 = 8,435.37/x
  3. Step 3: Cross multiply
    15,509.10x = 21,401.49 × 8,435.37
  4. Step 4: Simplify right side
    15,509.10x = 180,529,486.70
  5. Step 5: Solve for x
    x = 180,529,486.70/15,509.10
  6. Step 6: Final answer
    x = 11,640.23

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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.