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Finding the Fourth Proportional to 30,421.95, 45,599.02 and 12,642.68

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Solution

The fourth proportional to 30,421.95, 45,599.02 and 12,642.68 is: 18,949.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,421.95 : 45,599.02 = 12,642.68 : x
  2. Step 2: Convert to fraction form
    30,421.95/45,599.02 = 12,642.68/x
  3. Step 3: Cross multiply
    30,421.95x = 45,599.02 × 12,642.68
  4. Step 4: Simplify right side
    30,421.95x = 576,493,900.56
  5. Step 5: Solve for x
    x = 576,493,900.56/30,421.95
  6. Step 6: Final answer
    x = 18,949.93

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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.