Home / 18,990.06-28,490.85-13,454.12

Finding the Fourth Proportional to 18,990.06, 28,490.85 and 13,454.12

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Solution

The fourth proportional to 18,990.06, 28,490.85 and 13,454.12 is: 20,185.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.06 : 28,490.85 = 13,454.12 : x
  2. Step 2: Convert to fraction form
    18,990.06/28,490.85 = 13,454.12/x
  3. Step 3: Cross multiply
    18,990.06x = 28,490.85 × 13,454.12
  4. Step 4: Simplify right side
    18,990.06x = 383,319,172.35
  5. Step 5: Solve for x
    x = 383,319,172.35/18,990.06
  6. Step 6: Final answer
    x = 20,185.25

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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.