Home / 13,206.85-18,225.41-7,238.57

Finding the Fourth Proportional to 13,206.85, 18,225.41 and 7,238.57

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Solution

The fourth proportional to 13,206.85, 18,225.41 and 7,238.57 is: 9,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,206.85 : 18,225.41 = 7,238.57 : x
  2. Step 2: Convert to fraction form
    13,206.85/18,225.41 = 7,238.57/x
  3. Step 3: Cross multiply
    13,206.85x = 18,225.41 × 7,238.57
  4. Step 4: Simplify right side
    13,206.85x = 131,925,778.74
  5. Step 5: Solve for x
    x = 131,925,778.74/13,206.85
  6. Step 6: Final answer
    x = 9,989.20

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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.