Home / 21,298.63-29,390.88-12,222.07

Finding the Fourth Proportional to 21,298.63, 29,390.88 and 12,222.07

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Solution

The fourth proportional to 21,298.63, 29,390.88 and 12,222.07 is: 16,865.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298.63 : 29,390.88 = 12,222.07 : x
  2. Step 2: Convert to fraction form
    21,298.63/29,390.88 = 12,222.07/x
  3. Step 3: Cross multiply
    21,298.63x = 29,390.88 × 12,222.07
  4. Step 4: Simplify right side
    21,298.63x = 359,217,245.77
  5. Step 5: Solve for x
    x = 359,217,245.77/21,298.63
  6. Step 6: Final answer
    x = 16,865.75

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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.