Home / 13,779.21-20,645.04-7,543.71

Finding the Fourth Proportional to 13,779.21, 20,645.04 and 7,543.71

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Solution

The fourth proportional to 13,779.21, 20,645.04 and 7,543.71 is: 11,302.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.21 : 20,645.04 = 7,543.71 : x
  2. Step 2: Convert to fraction form
    13,779.21/20,645.04 = 7,543.71/x
  3. Step 3: Cross multiply
    13,779.21x = 20,645.04 × 7,543.71
  4. Step 4: Simplify right side
    13,779.21x = 155,740,194.70
  5. Step 5: Solve for x
    x = 155,740,194.70/13,779.21
  6. Step 6: Final answer
    x = 11,302.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.