Home / 21,278.84-31,916.86-7,949.24

Finding the Fourth Proportional to 21,278.84, 31,916.86 and 7,949.24

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Solution

The fourth proportional to 21,278.84, 31,916.86 and 7,949.24 is: 11,923.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.84 : 31,916.86 = 7,949.24 : x
  2. Step 2: Convert to fraction form
    21,278.84/31,916.86 = 7,949.24/x
  3. Step 3: Cross multiply
    21,278.84x = 31,916.86 × 7,949.24
  4. Step 4: Simplify right side
    21,278.84x = 253,714,780.19
  5. Step 5: Solve for x
    x = 253,714,780.19/21,278.84
  6. Step 6: Final answer
    x = 11,923.34

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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.