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Finding the Fourth Proportional to 31,604.80, 47,374.80 and 18,450.40

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Solution

The fourth proportional to 31,604.80, 47,374.80 and 18,450.40 is: 27,656.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,604.80 : 47,374.80 = 18,450.40 : x
  2. Step 2: Convert to fraction form
    31,604.80/47,374.80 = 18,450.40/x
  3. Step 3: Cross multiply
    31,604.80x = 47,374.80 × 18,450.40
  4. Step 4: Simplify right side
    31,604.80x = 874,084,009.92
  5. Step 5: Solve for x
    x = 874,084,009.92/31,604.80
  6. Step 6: Final answer
    x = 27,656.69

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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.