Home / 20,708.99-28,579.36-12,211.48

Finding the Fourth Proportional to 20,708.99, 28,579.36 and 12,211.48

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Solution

The fourth proportional to 20,708.99, 28,579.36 and 12,211.48 is: 16,852.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.99 : 28,579.36 = 12,211.48 : x
  2. Step 2: Convert to fraction form
    20,708.99/28,579.36 = 12,211.48/x
  3. Step 3: Cross multiply
    20,708.99x = 28,579.36 × 12,211.48
  4. Step 4: Simplify right side
    20,708.99x = 348,996,283.05
  5. Step 5: Solve for x
    x = 348,996,283.05/20,708.99
  6. Step 6: Final answer
    x = 16,852.40

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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.