Home / 21,890.56-30,209.34-12,460

Finding the Fourth Proportional to 21,890.56, 30,209.34 and 12,460

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Solution

The fourth proportional to 21,890.56, 30,209.34 and 12,460 is: 17,195.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.56 : 30,209.34 = 12,460 : x
  2. Step 2: Convert to fraction form
    21,890.56/30,209.34 = 12,460/x
  3. Step 3: Cross multiply
    21,890.56x = 30,209.34 × 12,460
  4. Step 4: Simplify right side
    21,890.56x = 376,408,376.40
  5. Step 5: Solve for x
    x = 376,408,376.40/21,890.56
  6. Step 6: Final answer
    x = 17,195.01

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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.