Home / 21,845.08-30,146.14-11,909.08

Finding the Fourth Proportional to 21,845.08, 30,146.14 and 11,909.08

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Solution

The fourth proportional to 21,845.08, 30,146.14 and 11,909.08 is: 16,434.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,845.08 : 30,146.14 = 11,909.08 : x
  2. Step 2: Convert to fraction form
    21,845.08/30,146.14 = 11,909.08/x
  3. Step 3: Cross multiply
    21,845.08x = 30,146.14 × 11,909.08
  4. Step 4: Simplify right side
    21,845.08x = 359,012,792.95
  5. Step 5: Solve for x
    x = 359,012,792.95/21,845.08
  6. Step 6: Final answer
    x = 16,434.49

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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.