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Finding the Fourth Proportional to 10,812, 14,920.64 and 6,623.04

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Solution

The fourth proportional to 10,812, 14,920.64 and 6,623.04 is: 9,139.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,812 : 14,920.64 = 6,623.04 : x
  2. Step 2: Convert to fraction form
    10,812/14,920.64 = 6,623.04/x
  3. Step 3: Cross multiply
    10,812x = 14,920.64 × 6,623.04
  4. Step 4: Simplify right side
    10,812x = 98,819,995.55
  5. Step 5: Solve for x
    x = 98,819,995.55/10,812
  6. Step 6: Final answer
    x = 9,139.84

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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.