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Finding the Fourth Proportional to 8,911.10, 13,291.29 and 8,397.16

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Solution

The fourth proportional to 8,911.10, 13,291.29 and 8,397.16 is: 12,524.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.10 : 13,291.29 = 8,397.16 : x
  2. Step 2: Convert to fraction form
    8,911.10/13,291.29 = 8,397.16/x
  3. Step 3: Cross multiply
    8,911.10x = 13,291.29 × 8,397.16
  4. Step 4: Simplify right side
    8,911.10x = 111,609,055.51
  5. Step 5: Solve for x
    x = 111,609,055.51/8,911.10
  6. Step 6: Final answer
    x = 12,524.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.