Home / 21,335.58-29,446.70-12,390.57

Finding the Fourth Proportional to 21,335.58, 29,446.70 and 12,390.57

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Solution

The fourth proportional to 21,335.58, 29,446.70 and 12,390.57 is: 17,101.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.58 : 29,446.70 = 12,390.57 : x
  2. Step 2: Convert to fraction form
    21,335.58/29,446.70 = 12,390.57/x
  3. Step 3: Cross multiply
    21,335.58x = 29,446.70 × 12,390.57
  4. Step 4: Simplify right side
    21,335.58x = 364,861,335.67
  5. Step 5: Solve for x
    x = 364,861,335.67/21,335.58
  6. Step 6: Final answer
    x = 17,101.07

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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.