Home / 13,281.12-19,928.40-5,385.48

Finding the Fourth Proportional to 13,281.12, 19,928.40 and 5,385.48

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Solution

The fourth proportional to 13,281.12, 19,928.40 and 5,385.48 is: 8,080.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.12 : 19,928.40 = 5,385.48 : x
  2. Step 2: Convert to fraction form
    13,281.12/19,928.40 = 5,385.48/x
  3. Step 3: Cross multiply
    13,281.12x = 19,928.40 × 5,385.48
  4. Step 4: Simplify right side
    13,281.12x = 107,323,999.63
  5. Step 5: Solve for x
    x = 107,323,999.63/13,281.12
  6. Step 6: Final answer
    x = 8,080.94

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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.