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Finding the Fourth Proportional to 12,621.60, 18,852.84 and 12,271.68

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Solution

The fourth proportional to 12,621.60, 18,852.84 and 12,271.68 is: 18,330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.60 : 18,852.84 = 12,271.68 : x
  2. Step 2: Convert to fraction form
    12,621.60/18,852.84 = 12,271.68/x
  3. Step 3: Cross multiply
    12,621.60x = 18,852.84 × 12,271.68
  4. Step 4: Simplify right side
    12,621.60x = 231,356,019.57
  5. Step 5: Solve for x
    x = 231,356,019.57/12,621.60
  6. Step 6: Final answer
    x = 18,330.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.