Home / 13,608.53-18,779.61-7,640.04

Finding the Fourth Proportional to 13,608.53, 18,779.61 and 7,640.04

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Solution

The fourth proportional to 13,608.53, 18,779.61 and 7,640.04 is: 10,543.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.53 : 18,779.61 = 7,640.04 : x
  2. Step 2: Convert to fraction form
    13,608.53/18,779.61 = 7,640.04/x
  3. Step 3: Cross multiply
    13,608.53x = 18,779.61 × 7,640.04
  4. Step 4: Simplify right side
    13,608.53x = 143,477,070.66
  5. Step 5: Solve for x
    x = 143,477,070.66/13,608.53
  6. Step 6: Final answer
    x = 10,543.17

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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.