Home / 15,112.84-20,856.70-9,144.76

Finding the Fourth Proportional to 15,112.84, 20,856.70 and 9,144.76

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Solution

The fourth proportional to 15,112.84, 20,856.70 and 9,144.76 is: 12,620.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,112.84 : 20,856.70 = 9,144.76 : x
  2. Step 2: Convert to fraction form
    15,112.84/20,856.70 = 9,144.76/x
  3. Step 3: Cross multiply
    15,112.84x = 20,856.70 × 9,144.76
  4. Step 4: Simplify right side
    15,112.84x = 190,729,515.89
  5. Step 5: Solve for x
    x = 190,729,515.89/15,112.84
  6. Step 6: Final answer
    x = 12,620.36

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Half scale
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Double scale
Find fourth proportional to 15,113.84, 20,858.08 and 9,145.76
Similar ratio
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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.