Home / 20,913.48-28,850.85-12,952.80

Finding the Fourth Proportional to 20,913.48, 28,850.85 and 12,952.80

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Solution

The fourth proportional to 20,913.48, 28,850.85 and 12,952.80 is: 17,868.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.48 : 28,850.85 = 12,952.80 : x
  2. Step 2: Convert to fraction form
    20,913.48/28,850.85 = 12,952.80/x
  3. Step 3: Cross multiply
    20,913.48x = 28,850.85 × 12,952.80
  4. Step 4: Simplify right side
    20,913.48x = 373,699,289.88
  5. Step 5: Solve for x
    x = 373,699,289.88/20,913.48
  6. Step 6: Final answer
    x = 17,868.82

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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.