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Finding the Fourth Proportional to 21,235.48, 31,853.04 and 5,440.48

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Solution

The fourth proportional to 21,235.48, 31,853.04 and 5,440.48 is: 8,160.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.48 : 31,853.04 = 5,440.48 : x
  2. Step 2: Convert to fraction form
    21,235.48/31,853.04 = 5,440.48/x
  3. Step 3: Cross multiply
    21,235.48x = 31,853.04 × 5,440.48
  4. Step 4: Simplify right side
    21,235.48x = 173,295,827.06
  5. Step 5: Solve for x
    x = 173,295,827.06/21,235.48
  6. Step 6: Final answer
    x = 8,160.67

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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.