Home / 21,289.37-31,948.88-8,809.45

Finding the Fourth Proportional to 21,289.37, 31,948.88 and 8,809.45

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Solution

The fourth proportional to 21,289.37, 31,948.88 and 8,809.45 is: 13,220.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.37 : 31,948.88 = 8,809.45 : x
  2. Step 2: Convert to fraction form
    21,289.37/31,948.88 = 8,809.45/x
  3. Step 3: Cross multiply
    21,289.37x = 31,948.88 × 8,809.45
  4. Step 4: Simplify right side
    21,289.37x = 281,451,937.00
  5. Step 5: Solve for x
    x = 281,451,937.00/21,289.37
  6. Step 6: Final answer
    x = 13,220.31

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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.