Home / 21,853.03-30,156.90-12,420.97

Finding the Fourth Proportional to 21,853.03, 30,156.90 and 12,420.97

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Solution

The fourth proportional to 21,853.03, 30,156.90 and 12,420.97 is: 17,140.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,853.03 : 30,156.90 = 12,420.97 : x
  2. Step 2: Convert to fraction form
    21,853.03/30,156.90 = 12,420.97/x
  3. Step 3: Cross multiply
    21,853.03x = 30,156.90 × 12,420.97
  4. Step 4: Simplify right side
    21,853.03x = 374,577,950.19
  5. Step 5: Solve for x
    x = 374,577,950.19/21,853.03
  6. Step 6: Final answer
    x = 17,140.78

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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.