Home / 21,013.98-31,520.94-14,420.16

Finding the Fourth Proportional to 21,013.98, 31,520.94 and 14,420.16

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Solution

The fourth proportional to 21,013.98, 31,520.94 and 14,420.16 is: 21,630.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.98 : 31,520.94 = 14,420.16 : x
  2. Step 2: Convert to fraction form
    21,013.98/31,520.94 = 14,420.16/x
  3. Step 3: Cross multiply
    21,013.98x = 31,520.94 × 14,420.16
  4. Step 4: Simplify right side
    21,013.98x = 454,536,998.15
  5. Step 5: Solve for x
    x = 454,536,998.15/21,013.98
  6. Step 6: Final answer
    x = 21,630.22

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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.