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Finding the Fourth Proportional to 14,779.25, 20,397.99 and 8,811.30

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Solution

The fourth proportional to 14,779.25, 20,397.99 and 8,811.30 is: 12,161.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,779.25 : 20,397.99 = 8,811.30 : x
  2. Step 2: Convert to fraction form
    14,779.25/20,397.99 = 8,811.30/x
  3. Step 3: Cross multiply
    14,779.25x = 20,397.99 × 8,811.30
  4. Step 4: Simplify right side
    14,779.25x = 179,732,809.29
  5. Step 5: Solve for x
    x = 179,732,809.29/14,779.25
  6. Step 6: Final answer
    x = 12,161.16

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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.