Home / 14,268.38-19,690.38-7,980.75

Finding the Fourth Proportional to 14,268.38, 19,690.38 and 7,980.75

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Solution

The fourth proportional to 14,268.38, 19,690.38 and 7,980.75 is: 11,013.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,268.38 : 19,690.38 = 7,980.75 : x
  2. Step 2: Convert to fraction form
    14,268.38/19,690.38 = 7,980.75/x
  3. Step 3: Cross multiply
    14,268.38x = 19,690.38 × 7,980.75
  4. Step 4: Simplify right side
    14,268.38x = 157,144,000.19
  5. Step 5: Solve for x
    x = 157,144,000.19/14,268.38
  6. Step 6: Final answer
    x = 11,013.45

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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.