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Finding the Fourth Proportional to 8,994.78, 12,421.35 and 8,503.92

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Solution

The fourth proportional to 8,994.78, 12,421.35 and 8,503.92 is: 11,743.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,994.78 : 12,421.35 = 8,503.92 : x
  2. Step 2: Convert to fraction form
    8,994.78/12,421.35 = 8,503.92/x
  3. Step 3: Cross multiply
    8,994.78x = 12,421.35 × 8,503.92
  4. Step 4: Simplify right side
    8,994.78x = 105,630,166.69
  5. Step 5: Solve for x
    x = 105,630,166.69/8,994.78
  6. Step 6: Final answer
    x = 11,743.50

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Double scale
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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.