Home / 28,809.76-39,768.48-19,405.12

Finding the Fourth Proportional to 28,809.76, 39,768.48 and 19,405.12

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Solution

The fourth proportional to 28,809.76, 39,768.48 and 19,405.12 is: 26,786.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,809.76 : 39,768.48 = 19,405.12 : x
  2. Step 2: Convert to fraction form
    28,809.76/39,768.48 = 19,405.12/x
  3. Step 3: Cross multiply
    28,809.76x = 39,768.48 × 19,405.12
  4. Step 4: Simplify right side
    28,809.76x = 771,712,126.62
  5. Step 5: Solve for x
    x = 771,712,126.62/28,809.76
  6. Step 6: Final answer
    x = 26,786.48

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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.