Home / 13,145.93-18,131.10-8,430.65

Finding the Fourth Proportional to 13,145.93, 18,131.10 and 8,430.65

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Solution

The fourth proportional to 13,145.93, 18,131.10 and 8,430.65 is: 11,627.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.93 : 18,131.10 = 8,430.65 : x
  2. Step 2: Convert to fraction form
    13,145.93/18,131.10 = 8,430.65/x
  3. Step 3: Cross multiply
    13,145.93x = 18,131.10 × 8,430.65
  4. Step 4: Simplify right side
    13,145.93x = 152,856,958.22
  5. Step 5: Solve for x
    x = 152,856,958.22/13,145.93
  6. Step 6: Final answer
    x = 11,627.70

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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.