Home / 20,315.00-28,040.71-11,820.95

Finding the Fourth Proportional to 20,315.00, 28,040.71 and 11,820.95

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Solution

The fourth proportional to 20,315.00, 28,040.71 and 11,820.95 is: 16,316.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.00 : 28,040.71 = 11,820.95 : x
  2. Step 2: Convert to fraction form
    20,315.00/28,040.71 = 11,820.95/x
  3. Step 3: Cross multiply
    20,315.00x = 28,040.71 × 11,820.95
  4. Step 4: Simplify right side
    20,315.00x = 331,467,871.42
  5. Step 5: Solve for x
    x = 331,467,871.42/20,315.00
  6. Step 6: Final answer
    x = 16,316.41

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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.