Home / 12,869.40-19,303.84-5,078.28

Finding the Fourth Proportional to 12,869.40, 19,303.84 and 5,078.28

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Solution

The fourth proportional to 12,869.40, 19,303.84 and 5,078.28 is: 7,617.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,869.40 : 19,303.84 = 5,078.28 : x
  2. Step 2: Convert to fraction form
    12,869.40/19,303.84 = 5,078.28/x
  3. Step 3: Cross multiply
    12,869.40x = 19,303.84 × 5,078.28
  4. Step 4: Simplify right side
    12,869.40x = 98,030,304.60
  5. Step 5: Solve for x
    x = 98,030,304.60/12,869.40
  6. Step 6: Final answer
    x = 7,617.32

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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.