Home / 21,158.37-31,758.90-9,317.41

Finding the Fourth Proportional to 21,158.37, 31,758.90 and 9,317.41

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Solution

The fourth proportional to 21,158.37, 31,758.90 and 9,317.41 is: 13,985.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.37 : 31,758.90 = 9,317.41 : x
  2. Step 2: Convert to fraction form
    21,158.37/31,758.90 = 9,317.41/x
  3. Step 3: Cross multiply
    21,158.37x = 31,758.90 × 9,317.41
  4. Step 4: Simplify right side
    21,158.37x = 295,910,692.45
  5. Step 5: Solve for x
    x = 295,910,692.45/21,158.37
  6. Step 6: Final answer
    x = 13,985.51

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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.