Home / 28,775.16-39,706.86-21,225.57

Finding the Fourth Proportional to 28,775.16, 39,706.86 and 21,225.57

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Solution

The fourth proportional to 28,775.16, 39,706.86 and 21,225.57 is: 29,289.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.16 : 39,706.86 = 21,225.57 : x
  2. Step 2: Convert to fraction form
    28,775.16/39,706.86 = 21,225.57/x
  3. Step 3: Cross multiply
    28,775.16x = 39,706.86 × 21,225.57
  4. Step 4: Simplify right side
    28,775.16x = 842,800,736.41
  5. Step 5: Solve for x
    x = 842,800,736.41/28,775.16
  6. Step 6: Final answer
    x = 29,289.18

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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.