Home / 20,307.11-30,455.79-6,978.56

Finding the Fourth Proportional to 20,307.11, 30,455.79 and 6,978.56

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Solution

The fourth proportional to 20,307.11, 30,455.79 and 6,978.56 is: 10,466.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,307.11 : 30,455.79 = 6,978.56 : x
  2. Step 2: Convert to fraction form
    20,307.11/30,455.79 = 6,978.56/x
  3. Step 3: Cross multiply
    20,307.11x = 30,455.79 × 6,978.56
  4. Step 4: Simplify right side
    20,307.11x = 212,537,557.86
  5. Step 5: Solve for x
    x = 212,537,557.86/20,307.11
  6. Step 6: Final answer
    x = 10,466.16

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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.