Home / 20,848.58-28,776.10-12,886

Finding the Fourth Proportional to 20,848.58, 28,776.10 and 12,886

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Solution

The fourth proportional to 20,848.58, 28,776.10 and 12,886 is: 17,785.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,848.58 : 28,776.10 = 12,886 : x
  2. Step 2: Convert to fraction form
    20,848.58/28,776.10 = 12,886/x
  3. Step 3: Cross multiply
    20,848.58x = 28,776.10 × 12,886
  4. Step 4: Simplify right side
    20,848.58x = 370,808,824.60
  5. Step 5: Solve for x
    x = 370,808,824.60/20,848.58
  6. Step 6: Final answer
    x = 17,785.81

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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.