Home / 13,985.20-20,986.65-12,671.64

Finding the Fourth Proportional to 13,985.20, 20,986.65 and 12,671.64

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Solution

The fourth proportional to 13,985.20, 20,986.65 and 12,671.64 is: 19,015.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.20 : 20,986.65 = 12,671.64 : x
  2. Step 2: Convert to fraction form
    13,985.20/20,986.65 = 12,671.64/x
  3. Step 3: Cross multiply
    13,985.20x = 20,986.65 × 12,671.64
  4. Step 4: Simplify right side
    13,985.20x = 265,935,200.35
  5. Step 5: Solve for x
    x = 265,935,200.35/13,985.20
  6. Step 6: Final answer
    x = 19,015.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.