Home / 15,400.21-21,252.05-8,685.85

Finding the Fourth Proportional to 15,400.21, 21,252.05 and 8,685.85

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Solution

The fourth proportional to 15,400.21, 21,252.05 and 8,685.85 is: 11,986.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.21 : 21,252.05 = 8,685.85 : x
  2. Step 2: Convert to fraction form
    15,400.21/21,252.05 = 8,685.85/x
  3. Step 3: Cross multiply
    15,400.21x = 21,252.05 × 8,685.85
  4. Step 4: Simplify right side
    15,400.21x = 184,592,075.06
  5. Step 5: Solve for x
    x = 184,592,075.06/15,400.21
  6. Step 6: Final answer
    x = 11,986.33

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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.