Home / 15,768.40-23,620.20-7,981.60

Finding the Fourth Proportional to 15,768.40, 23,620.20 and 7,981.60

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Solution

The fourth proportional to 15,768.40, 23,620.20 and 7,981.60 is: 11,956.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,768.40 : 23,620.20 = 7,981.60 : x
  2. Step 2: Convert to fraction form
    15,768.40/23,620.20 = 7,981.60/x
  3. Step 3: Cross multiply
    15,768.40x = 23,620.20 × 7,981.60
  4. Step 4: Simplify right side
    15,768.40x = 188,526,988.32
  5. Step 5: Solve for x
    x = 188,526,988.32/15,768.40
  6. Step 6: Final answer
    x = 11,956.00

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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.