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Finding the Fourth Proportional to 39,800.80, 59,830.80 and 28,194.40

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Solution

The fourth proportional to 39,800.80, 59,830.80 and 28,194.40 is: 42,383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,800.80 : 59,830.80 = 28,194.40 : x
  2. Step 2: Convert to fraction form
    39,800.80/59,830.80 = 28,194.40/x
  3. Step 3: Cross multiply
    39,800.80x = 59,830.80 × 28,194.40
  4. Step 4: Simplify right side
    39,800.80x = 1,686,893,507.52
  5. Step 5: Solve for x
    x = 1,686,893,507.52/39,800.80
  6. Step 6: Final answer
    x = 42,383.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.