Home / 20,266.36-30,378.74-7,783.02

Finding the Fourth Proportional to 20,266.36, 30,378.74 and 7,783.02

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Solution

The fourth proportional to 20,266.36, 30,378.74 and 7,783.02 is: 11,666.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,266.36 : 30,378.74 = 7,783.02 : x
  2. Step 2: Convert to fraction form
    20,266.36/30,378.74 = 7,783.02/x
  3. Step 3: Cross multiply
    20,266.36x = 30,378.74 × 7,783.02
  4. Step 4: Simplify right side
    20,266.36x = 236,438,360.45
  5. Step 5: Solve for x
    x = 236,438,360.45/20,266.36
  6. Step 6: Final answer
    x = 11,666.54

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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.