Home / 20,717.51-28,590.35-11,765.20

Finding the Fourth Proportional to 20,717.51, 28,590.35 and 11,765.20

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Solution

The fourth proportional to 20,717.51, 28,590.35 and 11,765.20 is: 16,236.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.51 : 28,590.35 = 11,765.20 : x
  2. Step 2: Convert to fraction form
    20,717.51/28,590.35 = 11,765.20/x
  3. Step 3: Cross multiply
    20,717.51x = 28,590.35 × 11,765.20
  4. Step 4: Simplify right side
    20,717.51x = 336,371,185.82
  5. Step 5: Solve for x
    x = 336,371,185.82/20,717.51
  6. Step 6: Final answer
    x = 16,236.08

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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.