Home / 21,916.40-32,923.20-21,030.80

Finding the Fourth Proportional to 21,916.40, 32,923.20 and 21,030.80

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Solution

The fourth proportional to 21,916.40, 32,923.20 and 21,030.80 is: 31,592.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,916.40 : 32,923.20 = 21,030.80 : x
  2. Step 2: Convert to fraction form
    21,916.40/32,923.20 = 21,030.80/x
  3. Step 3: Cross multiply
    21,916.40x = 32,923.20 × 21,030.80
  4. Step 4: Simplify right side
    21,916.40x = 692,401,234.56
  5. Step 5: Solve for x
    x = 692,401,234.56/21,916.40
  6. Step 6: Final answer
    x = 31,592.84

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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.