Home / 15,272.41-21,075.99-8,902.78

Finding the Fourth Proportional to 15,272.41, 21,075.99 and 8,902.78

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Solution

The fourth proportional to 15,272.41, 21,075.99 and 8,902.78 is: 12,285.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,272.41 : 21,075.99 = 8,902.78 : x
  2. Step 2: Convert to fraction form
    15,272.41/21,075.99 = 8,902.78/x
  3. Step 3: Cross multiply
    15,272.41x = 21,075.99 × 8,902.78
  4. Step 4: Simplify right side
    15,272.41x = 187,634,902.25
  5. Step 5: Solve for x
    x = 187,634,902.25/15,272.41
  6. Step 6: Final answer
    x = 12,285.87

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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.