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Finding the Fourth Proportional to 10,802.79, 16,178.99 and 8,317.89

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Solution

The fourth proportional to 10,802.79, 16,178.99 and 8,317.89 is: 12,457.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,802.79 : 16,178.99 = 8,317.89 : x
  2. Step 2: Convert to fraction form
    10,802.79/16,178.99 = 8,317.89/x
  3. Step 3: Cross multiply
    10,802.79x = 16,178.99 × 8,317.89
  4. Step 4: Simplify right side
    10,802.79x = 134,575,017.54
  5. Step 5: Solve for x
    x = 134,575,017.54/10,802.79
  6. Step 6: Final answer
    x = 12,457.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.