Home / 21,891.12-30,196.66-13,810.49

Finding the Fourth Proportional to 21,891.12, 30,196.66 and 13,810.49

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Solution

The fourth proportional to 21,891.12, 30,196.66 and 13,810.49 is: 19,050.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,891.12 : 30,196.66 = 13,810.49 : x
  2. Step 2: Convert to fraction form
    21,891.12/30,196.66 = 13,810.49/x
  3. Step 3: Cross multiply
    21,891.12x = 30,196.66 × 13,810.49
  4. Step 4: Simplify right side
    21,891.12x = 417,030,670.96
  5. Step 5: Solve for x
    x = 417,030,670.96/21,891.12
  6. Step 6: Final answer
    x = 19,050.22

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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.