Home / 28,447.07-42,636.04-20,129.51

Finding the Fourth Proportional to 28,447.07, 42,636.04 and 20,129.51

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Solution

The fourth proportional to 28,447.07, 42,636.04 and 20,129.51 is: 30,169.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,447.07 : 42,636.04 = 20,129.51 : x
  2. Step 2: Convert to fraction form
    28,447.07/42,636.04 = 20,129.51/x
  3. Step 3: Cross multiply
    28,447.07x = 42,636.04 × 20,129.51
  4. Step 4: Simplify right side
    28,447.07x = 858,242,649.81
  5. Step 5: Solve for x
    x = 858,242,649.81/28,447.07
  6. Step 6: Final answer
    x = 30,169.81

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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.