Home / 30,907.02-42,639.56-20,164.49

Finding the Fourth Proportional to 30,907.02, 42,639.56 and 20,164.49

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Solution

The fourth proportional to 30,907.02, 42,639.56 and 20,164.49 is: 27,819.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,907.02 : 42,639.56 = 20,164.49 : x
  2. Step 2: Convert to fraction form
    30,907.02/42,639.56 = 20,164.49/x
  3. Step 3: Cross multiply
    30,907.02x = 42,639.56 × 20,164.49
  4. Step 4: Simplify right side
    30,907.02x = 859,805,255.99
  5. Step 5: Solve for x
    x = 859,805,255.99/30,907.02
  6. Step 6: Final answer
    x = 27,819.09

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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.