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Finding the Fourth Proportional to 28,030.90, 42,050.76 and 8,311.42

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Solution

The fourth proportional to 28,030.90, 42,050.76 and 8,311.42 is: 12,468.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,030.90 : 42,050.76 = 8,311.42 : x
  2. Step 2: Convert to fraction form
    28,030.90/42,050.76 = 8,311.42/x
  3. Step 3: Cross multiply
    28,030.90x = 42,050.76 × 8,311.42
  4. Step 4: Simplify right side
    28,030.90x = 349,501,527.68
  5. Step 5: Solve for x
    x = 349,501,527.68/28,030.90
  6. Step 6: Final answer
    x = 12,468.44

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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.