Home / 30,083.05-45,139.53-13,438.61

Finding the Fourth Proportional to 30,083.05, 45,139.53 and 13,438.61

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Solution

The fourth proportional to 30,083.05, 45,139.53 and 13,438.61 is: 20,164.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,083.05 : 45,139.53 = 13,438.61 : x
  2. Step 2: Convert to fraction form
    30,083.05/45,139.53 = 13,438.61/x
  3. Step 3: Cross multiply
    30,083.05x = 45,139.53 × 13,438.61
  4. Step 4: Simplify right side
    30,083.05x = 606,612,457.63
  5. Step 5: Solve for x
    x = 606,612,457.63/30,083.05
  6. Step 6: Final answer
    x = 20,164.60

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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.