Home / 21,889.18-30,219.51-14,458.78

Finding the Fourth Proportional to 21,889.18, 30,219.51 and 14,458.78

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Solution

The fourth proportional to 21,889.18, 30,219.51 and 14,458.78 is: 19,961.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,889.18 : 30,219.51 = 14,458.78 : x
  2. Step 2: Convert to fraction form
    21,889.18/30,219.51 = 14,458.78/x
  3. Step 3: Cross multiply
    21,889.18x = 30,219.51 × 14,458.78
  4. Step 4: Simplify right side
    21,889.18x = 436,937,246.80
  5. Step 5: Solve for x
    x = 436,937,246.80/21,889.18
  6. Step 6: Final answer
    x = 19,961.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.