Home / 13,613.63-18,790.04-8,312.90

Finding the Fourth Proportional to 13,613.63, 18,790.04 and 8,312.90

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Solution

The fourth proportional to 13,613.63, 18,790.04 and 8,312.90 is: 11,473.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.63 : 18,790.04 = 8,312.90 : x
  2. Step 2: Convert to fraction form
    13,613.63/18,790.04 = 8,312.90/x
  3. Step 3: Cross multiply
    13,613.63x = 18,790.04 × 8,312.90
  4. Step 4: Simplify right side
    13,613.63x = 156,199,650.35
  5. Step 5: Solve for x
    x = 156,199,650.35/13,613.63
  6. Step 6: Final answer
    x = 11,473.77

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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.