Home / 21,438.41-29,585.32-12,485.68

Finding the Fourth Proportional to 21,438.41, 29,585.32 and 12,485.68

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Solution

The fourth proportional to 21,438.41, 29,585.32 and 12,485.68 is: 17,230.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.41 : 29,585.32 = 12,485.68 : x
  2. Step 2: Convert to fraction form
    21,438.41/29,585.32 = 12,485.68/x
  3. Step 3: Cross multiply
    21,438.41x = 29,585.32 × 12,485.68
  4. Step 4: Simplify right side
    21,438.41x = 369,392,733.04
  5. Step 5: Solve for x
    x = 369,392,733.04/21,438.41
  6. Step 6: Final answer
    x = 17,230.42

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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.