Home / 30,568.78-42,185.98-17,140.20

Finding the Fourth Proportional to 30,568.78, 42,185.98 and 17,140.20

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Solution

The fourth proportional to 30,568.78, 42,185.98 and 17,140.20 is: 23,654.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,568.78 : 42,185.98 = 17,140.20 : x
  2. Step 2: Convert to fraction form
    30,568.78/42,185.98 = 17,140.20/x
  3. Step 3: Cross multiply
    30,568.78x = 42,185.98 × 17,140.20
  4. Step 4: Simplify right side
    30,568.78x = 723,076,134.40
  5. Step 5: Solve for x
    x = 723,076,134.40/30,568.78
  6. Step 6: Final answer
    x = 23,654.07

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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.