Home / 20,266.17-30,378.47-7,782.83

Finding the Fourth Proportional to 20,266.17, 30,378.47 and 7,782.83

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Solution

The fourth proportional to 20,266.17, 30,378.47 and 7,782.83 is: 11,666.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,266.17 : 30,378.47 = 7,782.83 : x
  2. Step 2: Convert to fraction form
    20,266.17/30,378.47 = 7,782.83/x
  3. Step 3: Cross multiply
    20,266.17x = 30,378.47 × 7,782.83
  4. Step 4: Simplify right side
    20,266.17x = 236,430,390.78
  5. Step 5: Solve for x
    x = 236,430,390.78/20,266.17
  6. Step 6: Final answer
    x = 11,666.26

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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.