Home / 21,431.79-29,573.10-12,000.35

Finding the Fourth Proportional to 21,431.79, 29,573.10 and 12,000.35

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Solution

The fourth proportional to 21,431.79, 29,573.10 and 12,000.35 is: 16,558.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.79 : 29,573.10 = 12,000.35 : x
  2. Step 2: Convert to fraction form
    21,431.79/29,573.10 = 12,000.35/x
  3. Step 3: Cross multiply
    21,431.79x = 29,573.10 × 12,000.35
  4. Step 4: Simplify right side
    21,431.79x = 354,887,624.52
  5. Step 5: Solve for x
    x = 354,887,624.52/21,431.79
  6. Step 6: Final answer
    x = 16,558.94

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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.