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Finding the Fourth Proportional to 9,317.56, 13,981.20 and 8,779.72

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Solution

The fourth proportional to 9,317.56, 13,981.20 and 8,779.72 is: 13,174.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,317.56 : 13,981.20 = 8,779.72 : x
  2. Step 2: Convert to fraction form
    9,317.56/13,981.20 = 8,779.72/x
  3. Step 3: Cross multiply
    9,317.56x = 13,981.20 × 8,779.72
  4. Step 4: Simplify right side
    9,317.56x = 122,751,021.26
  5. Step 5: Solve for x
    x = 122,751,021.26/9,317.56
  6. Step 6: Final answer
    x = 13,174.16

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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.