Home / 18,990.86-26,206.34-12,280.01

Finding the Fourth Proportional to 18,990.86, 26,206.34 and 12,280.01

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Solution

The fourth proportional to 18,990.86, 26,206.34 and 12,280.01 is: 16,945.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.86 : 26,206.34 = 12,280.01 : x
  2. Step 2: Convert to fraction form
    18,990.86/26,206.34 = 12,280.01/x
  3. Step 3: Cross multiply
    18,990.86x = 26,206.34 × 12,280.01
  4. Step 4: Simplify right side
    18,990.86x = 321,813,924.83
  5. Step 5: Solve for x
    x = 321,813,924.83/18,990.86
  6. Step 6: Final answer
    x = 16,945.73

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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.