Home / 12,990.07-19,485.62-7,440.90

Finding the Fourth Proportional to 12,990.07, 19,485.62 and 7,440.90

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Solution

The fourth proportional to 12,990.07, 19,485.62 and 7,440.90 is: 11,161.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.07 : 19,485.62 = 7,440.90 : x
  2. Step 2: Convert to fraction form
    12,990.07/19,485.62 = 7,440.90/x
  3. Step 3: Cross multiply
    12,990.07x = 19,485.62 × 7,440.90
  4. Step 4: Simplify right side
    12,990.07x = 144,990,549.86
  5. Step 5: Solve for x
    x = 144,990,549.86/12,990.07
  6. Step 6: Final answer
    x = 11,161.64

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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.