Home / 21,278.34-31,916.34-6,486.02

Finding the Fourth Proportional to 21,278.34, 31,916.34 and 6,486.02

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Solution

The fourth proportional to 21,278.34, 31,916.34 and 6,486.02 is: 9,728.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.34 : 31,916.34 = 6,486.02 : x
  2. Step 2: Convert to fraction form
    21,278.34/31,916.34 = 6,486.02/x
  3. Step 3: Cross multiply
    21,278.34x = 31,916.34 × 6,486.02
  4. Step 4: Simplify right side
    21,278.34x = 207,009,859.99
  5. Step 5: Solve for x
    x = 207,009,859.99/21,278.34
  6. Step 6: Final answer
    x = 9,728.67

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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.