Home / 20,842.00-28,763.55-11,889.70

Finding the Fourth Proportional to 20,842.00, 28,763.55 and 11,889.70

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Solution

The fourth proportional to 20,842.00, 28,763.55 and 11,889.70 is: 16,408.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.00 : 28,763.55 = 11,889.70 : x
  2. Step 2: Convert to fraction form
    20,842.00/28,763.55 = 11,889.70/x
  3. Step 3: Cross multiply
    20,842.00x = 28,763.55 × 11,889.70
  4. Step 4: Simplify right side
    20,842.00x = 341,989,953.11
  5. Step 5: Solve for x
    x = 341,989,953.11/20,842.00
  6. Step 6: Final answer
    x = 16,408.69

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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.