Home / 21,014.10-31,505.40-12,692.21

Finding the Fourth Proportional to 21,014.10, 31,505.40 and 12,692.21

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Solution

The fourth proportional to 21,014.10, 31,505.40 and 12,692.21 is: 19,028.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,014.10 : 31,505.40 = 12,692.21 : x
  2. Step 2: Convert to fraction form
    21,014.10/31,505.40 = 12,692.21/x
  3. Step 3: Cross multiply
    21,014.10x = 31,505.40 × 12,692.21
  4. Step 4: Simplify right side
    21,014.10x = 399,872,995.41
  5. Step 5: Solve for x
    x = 399,872,995.41/21,014.10
  6. Step 6: Final answer
    x = 19,028.79

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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.