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Finding the Fourth Proportional to 15,779.88, 21,773.21 and 9,492.66

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Solution

The fourth proportional to 15,779.88, 21,773.21 and 9,492.66 is: 13,098.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.88 : 21,773.21 = 9,492.66 : x
  2. Step 2: Convert to fraction form
    15,779.88/21,773.21 = 9,492.66/x
  3. Step 3: Cross multiply
    15,779.88x = 21,773.21 × 9,492.66
  4. Step 4: Simplify right side
    15,779.88x = 206,685,679.64
  5. Step 5: Solve for x
    x = 206,685,679.64/15,779.88
  6. Step 6: Final answer
    x = 13,098.05

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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.