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Finding the Fourth Proportional to 30,040, 45,029.76 and 12,519.52

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Solution

The fourth proportional to 30,040, 45,029.76 and 12,519.52 is: 18,766.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,040 : 45,029.76 = 12,519.52 : x
  2. Step 2: Convert to fraction form
    30,040/45,029.76 = 12,519.52/x
  3. Step 3: Cross multiply
    30,040x = 45,029.76 × 12,519.52
  4. Step 4: Simplify right side
    30,040x = 563,750,980.92
  5. Step 5: Solve for x
    x = 563,750,980.92/30,040
  6. Step 6: Final answer
    x = 18,766.68

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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.