Home / 14,216.40-21,281.40-12,661.20

Finding the Fourth Proportional to 14,216.40, 21,281.40 and 12,661.20

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Solution

The fourth proportional to 14,216.40, 21,281.40 and 12,661.20 is: 18,953.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,216.40 : 21,281.40 = 12,661.20 : x
  2. Step 2: Convert to fraction form
    14,216.40/21,281.40 = 12,661.20/x
  3. Step 3: Cross multiply
    14,216.40x = 21,281.40 × 12,661.20
  4. Step 4: Simplify right side
    14,216.40x = 269,448,061.68
  5. Step 5: Solve for x
    x = 269,448,061.68/14,216.40
  6. Step 6: Final answer
    x = 18,953.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.