Home / 28,812.75-39,772.53-19,386.78

Finding the Fourth Proportional to 28,812.75, 39,772.53 and 19,386.78

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Solution

The fourth proportional to 28,812.75, 39,772.53 and 19,386.78 is: 26,761.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,812.75 : 39,772.53 = 19,386.78 : x
  2. Step 2: Convert to fraction form
    28,812.75/39,772.53 = 19,386.78/x
  3. Step 3: Cross multiply
    28,812.75x = 39,772.53 × 19,386.78
  4. Step 4: Simplify right side
    28,812.75x = 771,061,289.15
  5. Step 5: Solve for x
    x = 771,061,289.15/28,812.75
  6. Step 6: Final answer
    x = 26,761.11

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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.