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Finding the Fourth Proportional to 13,085.68, 18,060.84 and 7,779.44

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Solution

The fourth proportional to 13,085.68, 18,060.84 and 7,779.44 is: 10,737.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,085.68 : 18,060.84 = 7,779.44 : x
  2. Step 2: Convert to fraction form
    13,085.68/18,060.84 = 7,779.44/x
  3. Step 3: Cross multiply
    13,085.68x = 18,060.84 × 7,779.44
  4. Step 4: Simplify right side
    13,085.68x = 140,503,221.13
  5. Step 5: Solve for x
    x = 140,503,221.13/13,085.68
  6. Step 6: Final answer
    x = 10,737.17

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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.