Home / 21,782.63-30,055.39-12,826.86

Finding the Fourth Proportional to 21,782.63, 30,055.39 and 12,826.86

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Solution

The fourth proportional to 21,782.63, 30,055.39 and 12,826.86 is: 17,698.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,782.63 : 30,055.39 = 12,826.86 : x
  2. Step 2: Convert to fraction form
    21,782.63/30,055.39 = 12,826.86/x
  3. Step 3: Cross multiply
    21,782.63x = 30,055.39 × 12,826.86
  4. Step 4: Simplify right side
    21,782.63x = 385,516,247.71
  5. Step 5: Solve for x
    x = 385,516,247.71/21,782.63
  6. Step 6: Final answer
    x = 17,698.34

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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.