Home / 37,986.80-52,421.65-20,990.57

Finding the Fourth Proportional to 37,986.80, 52,421.65 and 20,990.57

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Solution

The fourth proportional to 37,986.80, 52,421.65 and 20,990.57 is: 28,966.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,986.80 : 52,421.65 = 20,990.57 : x
  2. Step 2: Convert to fraction form
    37,986.80/52,421.65 = 20,990.57/x
  3. Step 3: Cross multiply
    37,986.80x = 52,421.65 × 20,990.57
  4. Step 4: Simplify right side
    37,986.80x = 1,100,359,999.26
  5. Step 5: Solve for x
    x = 1,100,359,999.26/37,986.80
  6. Step 6: Final answer
    x = 28,966.91

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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.