Home / 20,911.04-28,847.61-13,353.59

Finding the Fourth Proportional to 20,911.04, 28,847.61 and 13,353.59

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Solution

The fourth proportional to 20,911.04, 28,847.61 and 13,353.59 is: 18,421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.04 : 28,847.61 = 13,353.59 : x
  2. Step 2: Convert to fraction form
    20,911.04/28,847.61 = 13,353.59/x
  3. Step 3: Cross multiply
    20,911.04x = 28,847.61 × 13,353.59
  4. Step 4: Simplify right side
    20,911.04x = 385,219,012.18
  5. Step 5: Solve for x
    x = 385,219,012.18/20,911.04
  6. Step 6: Final answer
    x = 18,421.80

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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.