Home / 14,268.30-19,690.20-7,980.72

Finding the Fourth Proportional to 14,268.30, 19,690.20 and 7,980.72

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Solution

The fourth proportional to 14,268.30, 19,690.20 and 7,980.72 is: 11,013.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,268.30 : 19,690.20 = 7,980.72 : x
  2. Step 2: Convert to fraction form
    14,268.30/19,690.20 = 7,980.72/x
  3. Step 3: Cross multiply
    14,268.30x = 19,690.20 × 7,980.72
  4. Step 4: Simplify right side
    14,268.30x = 157,141,972.94
  5. Step 5: Solve for x
    x = 157,141,972.94/14,268.30
  6. Step 6: Final answer
    x = 11,013.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.