Home / 20,386.83-28,135.52-11,313.05

Finding the Fourth Proportional to 20,386.83, 28,135.52 and 11,313.05

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Solution

The fourth proportional to 20,386.83, 28,135.52 and 11,313.05 is: 15,612.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.83 : 28,135.52 = 11,313.05 : x
  2. Step 2: Convert to fraction form
    20,386.83/28,135.52 = 11,313.05/x
  3. Step 3: Cross multiply
    20,386.83x = 28,135.52 × 11,313.05
  4. Step 4: Simplify right side
    20,386.83x = 318,298,418.00
  5. Step 5: Solve for x
    x = 318,298,418.00/20,386.83
  6. Step 6: Final answer
    x = 15,612.94

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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.