Home / 28,386.51-39,143.68-21,205.17

Finding the Fourth Proportional to 28,386.51, 39,143.68 and 21,205.17

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Solution

The fourth proportional to 28,386.51, 39,143.68 and 21,205.17 is: 29,240.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,386.51 : 39,143.68 = 21,205.17 : x
  2. Step 2: Convert to fraction form
    28,386.51/39,143.68 = 21,205.17/x
  3. Step 3: Cross multiply
    28,386.51x = 39,143.68 × 21,205.17
  4. Step 4: Simplify right side
    28,386.51x = 830,048,388.83
  5. Step 5: Solve for x
    x = 830,048,388.83/28,386.51
  6. Step 6: Final answer
    x = 29,240.95

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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.