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Finding the Fourth Proportional to 20,618.99, 30,913.34 and 6,570.93

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Solution

The fourth proportional to 20,618.99, 30,913.34 and 6,570.93 is: 9,851.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.99 : 30,913.34 = 6,570.93 : x
  2. Step 2: Convert to fraction form
    20,618.99/30,913.34 = 6,570.93/x
  3. Step 3: Cross multiply
    20,618.99x = 30,913.34 × 6,570.93
  4. Step 4: Simplify right side
    20,618.99x = 203,129,393.21
  5. Step 5: Solve for x
    x = 203,129,393.21/20,618.99
  6. Step 6: Final answer
    x = 9,851.57

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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.