Home / 20,411.49-30,603.32-10,391.61

Finding the Fourth Proportional to 20,411.49, 30,603.32 and 10,391.61

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Solution

The fourth proportional to 20,411.49, 30,603.32 and 10,391.61 is: 15,580.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.49 : 30,603.32 = 10,391.61 : x
  2. Step 2: Convert to fraction form
    20,411.49/30,603.32 = 10,391.61/x
  3. Step 3: Cross multiply
    20,411.49x = 30,603.32 × 10,391.61
  4. Step 4: Simplify right side
    20,411.49x = 318,017,714.19
  5. Step 5: Solve for x
    x = 318,017,714.19/20,411.49
  6. Step 6: Final answer
    x = 15,580.33

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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.