Home / 28,544.16-39,428.59-21,911.75

Finding the Fourth Proportional to 28,544.16, 39,428.59 and 21,911.75

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Solution

The fourth proportional to 28,544.16, 39,428.59 and 21,911.75 is: 30,267.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,544.16 : 39,428.59 = 21,911.75 : x
  2. Step 2: Convert to fraction form
    28,544.16/39,428.59 = 21,911.75/x
  3. Step 3: Cross multiply
    28,544.16x = 39,428.59 × 21,911.75
  4. Step 4: Simplify right side
    28,544.16x = 863,949,209.79
  5. Step 5: Solve for x
    x = 863,949,209.79/28,544.16
  6. Step 6: Final answer
    x = 30,267.11

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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.