Home / 18,920.57-28,386.32-7,825.19

Finding the Fourth Proportional to 18,920.57, 28,386.32 and 7,825.19

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Solution

The fourth proportional to 18,920.57, 28,386.32 and 7,825.19 is: 11,740.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.57 : 28,386.32 = 7,825.19 : x
  2. Step 2: Convert to fraction form
    18,920.57/28,386.32 = 7,825.19/x
  3. Step 3: Cross multiply
    18,920.57x = 28,386.32 × 7,825.19
  4. Step 4: Simplify right side
    18,920.57x = 222,128,166.34
  5. Step 5: Solve for x
    x = 222,128,166.34/18,920.57
  6. Step 6: Final answer
    x = 11,740.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.