Home / 13,655.45-20,479.53-8,423.08

Finding the Fourth Proportional to 13,655.45, 20,479.53 and 8,423.08

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Solution

The fourth proportional to 13,655.45, 20,479.53 and 8,423.08 is: 12,632.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.45 : 20,479.53 = 8,423.08 : x
  2. Step 2: Convert to fraction form
    13,655.45/20,479.53 = 8,423.08/x
  3. Step 3: Cross multiply
    13,655.45x = 20,479.53 × 8,423.08
  4. Step 4: Simplify right side
    13,655.45x = 172,500,617.15
  5. Step 5: Solve for x
    x = 172,500,617.15/13,655.45
  6. Step 6: Final answer
    x = 12,632.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.