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Finding the Fourth Proportional to 8,905, 12,289.12 and 4,926.20

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Solution

The fourth proportional to 8,905, 12,289.12 and 4,926.20 is: 6,798.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905 : 12,289.12 = 4,926.20 : x
  2. Step 2: Convert to fraction form
    8,905/12,289.12 = 4,926.20/x
  3. Step 3: Cross multiply
    8,905x = 12,289.12 × 4,926.20
  4. Step 4: Simplify right side
    8,905x = 60,538,662.94
  5. Step 5: Solve for x
    x = 60,538,662.94/8,905
  6. Step 6: Final answer
    x = 6,798.28

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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.