Home / 20,643.51-28,487.09-11,691.08

Finding the Fourth Proportional to 20,643.51, 28,487.09 and 11,691.08

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Solution

The fourth proportional to 20,643.51, 28,487.09 and 11,691.08 is: 16,133.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.51 : 28,487.09 = 11,691.08 : x
  2. Step 2: Convert to fraction form
    20,643.51/28,487.09 = 11,691.08/x
  3. Step 3: Cross multiply
    20,643.51x = 28,487.09 × 11,691.08
  4. Step 4: Simplify right side
    20,643.51x = 333,044,921.90
  5. Step 5: Solve for x
    x = 333,044,921.90/20,643.51
  6. Step 6: Final answer
    x = 16,133.15

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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.