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Finding the Fourth Proportional to 15,777.60, 21,773.73 and 8,704.47

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Solution

The fourth proportional to 15,777.60, 21,773.73 and 8,704.47 is: 12,012.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.60 : 21,773.73 = 8,704.47 : x
  2. Step 2: Convert to fraction form
    15,777.60/21,773.73 = 8,704.47/x
  3. Step 3: Cross multiply
    15,777.60x = 21,773.73 × 8,704.47
  4. Step 4: Simplify right side
    15,777.60x = 189,528,779.57
  5. Step 5: Solve for x
    x = 189,528,779.57/15,777.60
  6. Step 6: Final answer
    x = 12,012.52

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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.