Home / 21,302.80-31,954.20-7,278.67

Finding the Fourth Proportional to 21,302.80, 31,954.20 and 7,278.67

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Solution

The fourth proportional to 21,302.80, 31,954.20 and 7,278.67 is: 10,918.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,302.80 : 31,954.20 = 7,278.67 : x
  2. Step 2: Convert to fraction form
    21,302.80/31,954.20 = 7,278.67/x
  3. Step 3: Cross multiply
    21,302.80x = 31,954.20 × 7,278.67
  4. Step 4: Simplify right side
    21,302.80x = 232,584,076.91
  5. Step 5: Solve for x
    x = 232,584,076.91/21,302.80
  6. Step 6: Final answer
    x = 10,918.01

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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.