Home / 28,988.28-39,990.38-20,048.31

Finding the Fourth Proportional to 28,988.28, 39,990.38 and 20,048.31

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Solution

The fourth proportional to 28,988.28, 39,990.38 and 20,048.31 is: 27,657.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,988.28 : 39,990.38 = 20,048.31 : x
  2. Step 2: Convert to fraction form
    28,988.28/39,990.38 = 20,048.31/x
  3. Step 3: Cross multiply
    28,988.28x = 39,990.38 × 20,048.31
  4. Step 4: Simplify right side
    28,988.28x = 801,739,435.02
  5. Step 5: Solve for x
    x = 801,739,435.02/28,988.28
  6. Step 6: Final answer
    x = 27,657.36

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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.