Home / 12,739.60-19,106.12-3,970

Finding the Fourth Proportional to 12,739.60, 19,106.12 and 3,970

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Solution

The fourth proportional to 12,739.60, 19,106.12 and 3,970 is: 5,953.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.60 : 19,106.12 = 3,970 : x
  2. Step 2: Convert to fraction form
    12,739.60/19,106.12 = 3,970/x
  3. Step 3: Cross multiply
    12,739.60x = 19,106.12 × 3,970
  4. Step 4: Simplify right side
    12,739.60x = 75,851,296.40
  5. Step 5: Solve for x
    x = 75,851,296.40/12,739.60
  6. Step 6: Final answer
    x = 5,953.98

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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.