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Finding the Fourth Proportional to 13,898.55, 20,829.39 and 7,329.39

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Solution

The fourth proportional to 13,898.55, 20,829.39 and 7,329.39 is: 10,984.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,898.55 : 20,829.39 = 7,329.39 : x
  2. Step 2: Convert to fraction form
    13,898.55/20,829.39 = 7,329.39/x
  3. Step 3: Cross multiply
    13,898.55x = 20,829.39 × 7,329.39
  4. Step 4: Simplify right side
    13,898.55x = 152,666,722.77
  5. Step 5: Solve for x
    x = 152,666,722.77/13,898.55
  6. Step 6: Final answer
    x = 10,984.36

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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.