Home / 21,765.66-30,036.33-12,813.54

Finding the Fourth Proportional to 21,765.66, 30,036.33 and 12,813.54

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Solution

The fourth proportional to 21,765.66, 30,036.33 and 12,813.54 is: 17,682.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,765.66 : 30,036.33 = 12,813.54 : x
  2. Step 2: Convert to fraction form
    21,765.66/30,036.33 = 12,813.54/x
  3. Step 3: Cross multiply
    21,765.66x = 30,036.33 × 12,813.54
  4. Step 4: Simplify right side
    21,765.66x = 384,871,715.91
  5. Step 5: Solve for x
    x = 384,871,715.91/21,765.66
  6. Step 6: Final answer
    x = 17,682.52

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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.