Home / 30,644.28-42,278.22-20,040.12

Finding the Fourth Proportional to 30,644.28, 42,278.22 and 20,040.12

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Solution

The fourth proportional to 30,644.28, 42,278.22 and 20,040.12 is: 27,648.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,644.28 : 42,278.22 = 20,040.12 : x
  2. Step 2: Convert to fraction form
    30,644.28/42,278.22 = 20,040.12/x
  3. Step 3: Cross multiply
    30,644.28x = 42,278.22 × 20,040.12
  4. Step 4: Simplify right side
    30,644.28x = 847,260,602.19
  5. Step 5: Solve for x
    x = 847,260,602.19/30,644.28
  6. Step 6: Final answer
    x = 27,648.25

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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.