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Finding the Fourth Proportional to 8,911.86, 12,291.72 and 7,503.06

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Solution

The fourth proportional to 8,911.86, 12,291.72 and 7,503.06 is: 10,348.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.86 : 12,291.72 = 7,503.06 : x
  2. Step 2: Convert to fraction form
    8,911.86/12,291.72 = 7,503.06/x
  3. Step 3: Cross multiply
    8,911.86x = 12,291.72 × 7,503.06
  4. Step 4: Simplify right side
    8,911.86x = 92,225,512.66
  5. Step 5: Solve for x
    x = 92,225,512.66/8,911.86
  6. Step 6: Final answer
    x = 10,348.63

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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.