Home / 20,993.85-28,970.64-12,040.83

Finding the Fourth Proportional to 20,993.85, 28,970.64 and 12,040.83

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Solution

The fourth proportional to 20,993.85, 28,970.64 and 12,040.83 is: 16,615.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.85 : 28,970.64 = 12,040.83 : x
  2. Step 2: Convert to fraction form
    20,993.85/28,970.64 = 12,040.83/x
  3. Step 3: Cross multiply
    20,993.85x = 28,970.64 × 12,040.83
  4. Step 4: Simplify right side
    20,993.85x = 348,830,551.23
  5. Step 5: Solve for x
    x = 348,830,551.23/20,993.85
  6. Step 6: Final answer
    x = 16,615.84

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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.