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Finding the Fourth Proportional to 13,613.16, 18,785.58 and 7,948.23

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Solution

The fourth proportional to 13,613.16, 18,785.58 and 7,948.23 is: 10,968.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.16 : 18,785.58 = 7,948.23 : x
  2. Step 2: Convert to fraction form
    13,613.16/18,785.58 = 7,948.23/x
  3. Step 3: Cross multiply
    13,613.16x = 18,785.58 × 7,948.23
  4. Step 4: Simplify right side
    13,613.16x = 149,312,110.52
  5. Step 5: Solve for x
    x = 149,312,110.52/13,613.16
  6. Step 6: Final answer
    x = 10,968.22

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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.