Home / 30,524.15-42,129.44-20,989.91

Finding the Fourth Proportional to 30,524.15, 42,129.44 and 20,989.91

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Solution

The fourth proportional to 30,524.15, 42,129.44 and 20,989.91 is: 28,970.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,524.15 : 42,129.44 = 20,989.91 : x
  2. Step 2: Convert to fraction form
    30,524.15/42,129.44 = 20,989.91/x
  3. Step 3: Cross multiply
    30,524.15x = 42,129.44 × 20,989.91
  4. Step 4: Simplify right side
    30,524.15x = 884,292,838.35
  5. Step 5: Solve for x
    x = 884,292,838.35/30,524.15
  6. Step 6: Final answer
    x = 28,970.27

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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.