Home / 28,765.75-39,676.28-19,200.81

Finding the Fourth Proportional to 28,765.75, 39,676.28 and 19,200.81

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Solution

The fourth proportional to 28,765.75, 39,676.28 and 19,200.81 is: 26,483.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,765.75 : 39,676.28 = 19,200.81 : x
  2. Step 2: Convert to fraction form
    28,765.75/39,676.28 = 19,200.81/x
  3. Step 3: Cross multiply
    28,765.75x = 39,676.28 × 19,200.81
  4. Step 4: Simplify right side
    28,765.75x = 761,816,927.78
  5. Step 5: Solve for x
    x = 761,816,927.78/28,765.75
  6. Step 6: Final answer
    x = 26,483.47

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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.