Home / 13,607.90-18,779.24-7,640.03

Finding the Fourth Proportional to 13,607.90, 18,779.24 and 7,640.03

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Solution

The fourth proportional to 13,607.90, 18,779.24 and 7,640.03 is: 10,543.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.90 : 18,779.24 = 7,640.03 : x
  2. Step 2: Convert to fraction form
    13,607.90/18,779.24 = 7,640.03/x
  3. Step 3: Cross multiply
    13,607.90x = 18,779.24 × 7,640.03
  4. Step 4: Simplify right side
    13,607.90x = 143,473,824.88
  5. Step 5: Solve for x
    x = 143,473,824.88/13,607.90
  6. Step 6: Final answer
    x = 10,543.43

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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.