Home / 19,643.90-27,107.80-11,689.70

Finding the Fourth Proportional to 19,643.90, 27,107.80 and 11,689.70

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Solution

The fourth proportional to 19,643.90, 27,107.80 and 11,689.70 is: 16,131.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,643.90 : 27,107.80 = 11,689.70 : x
  2. Step 2: Convert to fraction form
    19,643.90/27,107.80 = 11,689.70/x
  3. Step 3: Cross multiply
    19,643.90x = 27,107.80 × 11,689.70
  4. Step 4: Simplify right side
    19,643.90x = 316,881,884.90
  5. Step 5: Solve for x
    x = 316,881,884.90/19,643.90
  6. Step 6: Final answer
    x = 16,131.32

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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.