Home / 12,904.64-19,352.80-4,139.20

Finding the Fourth Proportional to 12,904.64, 19,352.80 and 4,139.20

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Solution

The fourth proportional to 12,904.64, 19,352.80 and 4,139.20 is: 6,207.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.64 : 19,352.80 = 4,139.20 : x
  2. Step 2: Convert to fraction form
    12,904.64/19,352.80 = 4,139.20/x
  3. Step 3: Cross multiply
    12,904.64x = 19,352.80 × 4,139.20
  4. Step 4: Simplify right side
    12,904.64x = 80,105,109.76
  5. Step 5: Solve for x
    x = 80,105,109.76/12,904.64
  6. Step 6: Final answer
    x = 6,207.47

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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.