Home / 19,873.35-27,427.82-12,820.28

Finding the Fourth Proportional to 19,873.35, 27,427.82 and 12,820.28

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Solution

The fourth proportional to 19,873.35, 27,427.82 and 12,820.28 is: 17,693.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,873.35 : 27,427.82 = 12,820.28 : x
  2. Step 2: Convert to fraction form
    19,873.35/27,427.82 = 12,820.28/x
  3. Step 3: Cross multiply
    19,873.35x = 27,427.82 × 12,820.28
  4. Step 4: Simplify right side
    19,873.35x = 351,632,130.95
  5. Step 5: Solve for x
    x = 351,632,130.95/19,873.35
  6. Step 6: Final answer
    x = 17,693.65

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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.