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Finding the Fourth Proportional to 14,779.62, 20,395.90 and 8,065.28

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Solution

The fourth proportional to 14,779.62, 20,395.90 and 8,065.28 is: 11,130.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,779.62 : 20,395.90 = 8,065.28 : x
  2. Step 2: Convert to fraction form
    14,779.62/20,395.90 = 8,065.28/x
  3. Step 3: Cross multiply
    14,779.62x = 20,395.90 × 8,065.28
  4. Step 4: Simplify right side
    14,779.62x = 164,498,644.35
  5. Step 5: Solve for x
    x = 164,498,644.35/14,779.62
  6. Step 6: Final answer
    x = 11,130.10

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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.