Home / 13,608.18-18,779.58-7,640.01

Finding the Fourth Proportional to 13,608.18, 18,779.58 and 7,640.01

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Solution

The fourth proportional to 13,608.18, 18,779.58 and 7,640.01 is: 10,543.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.18 : 18,779.58 = 7,640.01 : x
  2. Step 2: Convert to fraction form
    13,608.18/18,779.58 = 7,640.01/x
  3. Step 3: Cross multiply
    13,608.18x = 18,779.58 × 7,640.01
  4. Step 4: Simplify right side
    13,608.18x = 143,476,179.00
  5. Step 5: Solve for x
    x = 143,476,179.00/13,608.18
  6. Step 6: Final answer
    x = 10,543.38

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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.