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Finding the Fourth Proportional to 30,020.54, 45,030.74 and 28,193.71

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Solution

The fourth proportional to 30,020.54, 45,030.74 and 28,193.71 is: 42,290.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,020.54 : 45,030.74 = 28,193.71 : x
  2. Step 2: Convert to fraction form
    30,020.54/45,030.74 = 28,193.71/x
  3. Step 3: Cross multiply
    30,020.54x = 45,030.74 × 28,193.71
  4. Step 4: Simplify right side
    30,020.54x = 1,269,583,582.55
  5. Step 5: Solve for x
    x = 1,269,583,582.55/30,020.54
  6. Step 6: Final answer
    x = 42,290.50

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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.