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Finding the Fourth Proportional to 14,920.51, 20,589.90 and 8,206.82

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Solution

The fourth proportional to 14,920.51, 20,589.90 and 8,206.82 is: 11,325.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,920.51 : 20,589.90 = 8,206.82 : x
  2. Step 2: Convert to fraction form
    14,920.51/20,589.90 = 8,206.82/x
  3. Step 3: Cross multiply
    14,920.51x = 20,589.90 × 8,206.82
  4. Step 4: Simplify right side
    14,920.51x = 168,977,603.12
  5. Step 5: Solve for x
    x = 168,977,603.12/14,920.51
  6. Step 6: Final answer
    x = 11,325.19

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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.