Home / 13,421.70-20,109.69-8,734.59

Finding the Fourth Proportional to 13,421.70, 20,109.69 and 8,734.59

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Solution

The fourth proportional to 13,421.70, 20,109.69 and 8,734.59 is: 13,087.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.70 : 20,109.69 = 8,734.59 : x
  2. Step 2: Convert to fraction form
    13,421.70/20,109.69 = 8,734.59/x
  3. Step 3: Cross multiply
    13,421.70x = 20,109.69 × 8,734.59
  4. Step 4: Simplify right side
    13,421.70x = 175,649,897.18
  5. Step 5: Solve for x
    x = 175,649,897.18/13,421.70
  6. Step 6: Final answer
    x = 13,087.01

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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.