Home / 30,897.02-42,615.24-20,282.78

Finding the Fourth Proportional to 30,897.02, 42,615.24 and 20,282.78

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Solution

The fourth proportional to 30,897.02, 42,615.24 and 20,282.78 is: 27,975.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,897.02 : 42,615.24 = 20,282.78 : x
  2. Step 2: Convert to fraction form
    30,897.02/42,615.24 = 20,282.78/x
  3. Step 3: Cross multiply
    30,897.02x = 42,615.24 × 20,282.78
  4. Step 4: Simplify right side
    30,897.02x = 864,355,537.57
  5. Step 5: Solve for x
    x = 864,355,537.57/30,897.02
  6. Step 6: Final answer
    x = 27,975.37

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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.