Home / 21,647.76-29,870.28-12,213.60

Finding the Fourth Proportional to 21,647.76, 29,870.28 and 12,213.60

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Solution

The fourth proportional to 21,647.76, 29,870.28 and 12,213.60 is: 16,852.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,647.76 : 29,870.28 = 12,213.60 : x
  2. Step 2: Convert to fraction form
    21,647.76/29,870.28 = 12,213.60/x
  3. Step 3: Cross multiply
    21,647.76x = 29,870.28 × 12,213.60
  4. Step 4: Simplify right side
    21,647.76x = 364,823,651.81
  5. Step 5: Solve for x
    x = 364,823,651.81/21,647.76
  6. Step 6: Final answer
    x = 16,852.72

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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.