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Finding the Fourth Proportional to 49,648.40, 74,485.80 and 21,556.40

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Solution

The fourth proportional to 49,648.40, 74,485.80 and 21,556.40 is: 32,340.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,648.40 : 74,485.80 = 21,556.40 : x
  2. Step 2: Convert to fraction form
    49,648.40/74,485.80 = 21,556.40/x
  3. Step 3: Cross multiply
    49,648.40x = 74,485.80 × 21,556.40
  4. Step 4: Simplify right side
    49,648.40x = 1,605,645,699.12
  5. Step 5: Solve for x
    x = 1,605,645,699.12/49,648.40
  6. Step 6: Final answer
    x = 32,340.33

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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.