Home / 39,878.02-55,029.19-21,972.02

Finding the Fourth Proportional to 39,878.02, 55,029.19 and 21,972.02

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Solution

The fourth proportional to 39,878.02, 55,029.19 and 21,972.02 is: 30,320.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,878.02 : 55,029.19 = 21,972.02 : x
  2. Step 2: Convert to fraction form
    39,878.02/55,029.19 = 21,972.02/x
  3. Step 3: Cross multiply
    39,878.02x = 55,029.19 × 21,972.02
  4. Step 4: Simplify right side
    39,878.02x = 1,209,102,353.40
  5. Step 5: Solve for x
    x = 1,209,102,353.40/39,878.02
  6. Step 6: Final answer
    x = 30,320.02

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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.