Home / 21,948.84-30,289.54-12,872.35

Finding the Fourth Proportional to 21,948.84, 30,289.54 and 12,872.35

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Solution

The fourth proportional to 21,948.84, 30,289.54 and 12,872.35 is: 17,763.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,948.84 : 30,289.54 = 12,872.35 : x
  2. Step 2: Convert to fraction form
    21,948.84/30,289.54 = 12,872.35/x
  3. Step 3: Cross multiply
    21,948.84x = 30,289.54 × 12,872.35
  4. Step 4: Simplify right side
    21,948.84x = 389,897,687.05
  5. Step 5: Solve for x
    x = 389,897,687.05/21,948.84
  6. Step 6: Final answer
    x = 17,763.93

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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.