Home / 30,520.36-42,126.24-28,661.68

Finding the Fourth Proportional to 30,520.36, 42,126.24 and 28,661.68

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Solution

The fourth proportional to 30,520.36, 42,126.24 and 28,661.68 is: 39,560.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,520.36 : 42,126.24 = 28,661.68 : x
  2. Step 2: Convert to fraction form
    30,520.36/42,126.24 = 28,661.68/x
  3. Step 3: Cross multiply
    30,520.36x = 42,126.24 × 28,661.68
  4. Step 4: Simplify right side
    30,520.36x = 1,207,408,810.48
  5. Step 5: Solve for x
    x = 1,207,408,810.48/30,520.36
  6. Step 6: Final answer
    x = 39,560.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.