Home / 20,599.12-28,427.28-12,215.68

Finding the Fourth Proportional to 20,599.12, 28,427.28 and 12,215.68

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Solution

The fourth proportional to 20,599.12, 28,427.28 and 12,215.68 is: 16,857.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599.12 : 28,427.28 = 12,215.68 : x
  2. Step 2: Convert to fraction form
    20,599.12/28,427.28 = 12,215.68/x
  3. Step 3: Cross multiply
    20,599.12x = 28,427.28 × 12,215.68
  4. Step 4: Simplify right side
    20,599.12x = 347,258,555.75
  5. Step 5: Solve for x
    x = 347,258,555.75/20,599.12
  6. Step 6: Final answer
    x = 16,857.93

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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.