Home / 12,686.23-19,030.25-3,920

Finding the Fourth Proportional to 12,686.23, 19,030.25 and 3,920

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Solution

The fourth proportional to 12,686.23, 19,030.25 and 3,920 is: 5,880.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.23 : 19,030.25 = 3,920 : x
  2. Step 2: Convert to fraction form
    12,686.23/19,030.25 = 3,920/x
  3. Step 3: Cross multiply
    12,686.23x = 19,030.25 × 3,920
  4. Step 4: Simplify right side
    12,686.23x = 74,598,580
  5. Step 5: Solve for x
    x = 74,598,580/12,686.23
  6. Step 6: Final answer
    x = 5,880.28

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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.