Home / 20,705.40-28,569.24-19,994.28

Finding the Fourth Proportional to 20,705.40, 28,569.24 and 19,994.28

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Solution

The fourth proportional to 20,705.40, 28,569.24 and 19,994.28 is: 27,588.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.40 : 28,569.24 = 19,994.28 : x
  2. Step 2: Convert to fraction form
    20,705.40/28,569.24 = 19,994.28/x
  3. Step 3: Cross multiply
    20,705.40x = 28,569.24 × 19,994.28
  4. Step 4: Simplify right side
    20,705.40x = 571,221,383.95
  5. Step 5: Solve for x
    x = 571,221,383.95/20,705.40
  6. Step 6: Final answer
    x = 27,588.04

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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.