Home / 21,813.55-30,105.54-13,313.91

Finding the Fourth Proportional to 21,813.55, 30,105.54 and 13,313.91

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Solution

The fourth proportional to 21,813.55, 30,105.54 and 13,313.91 is: 18,374.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,813.55 : 30,105.54 = 13,313.91 : x
  2. Step 2: Convert to fraction form
    21,813.55/30,105.54 = 13,313.91/x
  3. Step 3: Cross multiply
    21,813.55x = 30,105.54 × 13,313.91
  4. Step 4: Simplify right side
    21,813.55x = 400,822,295.11
  5. Step 5: Solve for x
    x = 400,822,295.11/21,813.55
  6. Step 6: Final answer
    x = 18,374.92

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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.