Home / 37,985.70-52,420.37-20,990.42

Finding the Fourth Proportional to 37,985.70, 52,420.37 and 20,990.42

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Solution

The fourth proportional to 37,985.70, 52,420.37 and 20,990.42 is: 28,966.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,985.70 : 52,420.37 = 20,990.42 : x
  2. Step 2: Convert to fraction form
    37,985.70/52,420.37 = 20,990.42/x
  3. Step 3: Cross multiply
    37,985.70x = 52,420.37 × 20,990.42
  4. Step 4: Simplify right side
    37,985.70x = 1,100,325,582.86
  5. Step 5: Solve for x
    x = 1,100,325,582.86/37,985.70
  6. Step 6: Final answer
    x = 28,966.84

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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.