Home / 21,715.63-29,965.17-12,765.94

Finding the Fourth Proportional to 21,715.63, 29,965.17 and 12,765.94

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Solution

The fourth proportional to 21,715.63, 29,965.17 and 12,765.94 is: 17,615.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.63 : 29,965.17 = 12,765.94 : x
  2. Step 2: Convert to fraction form
    21,715.63/29,965.17 = 12,765.94/x
  3. Step 3: Cross multiply
    21,715.63x = 29,965.17 × 12,765.94
  4. Step 4: Simplify right side
    21,715.63x = 382,533,562.31
  5. Step 5: Solve for x
    x = 382,533,562.31/21,715.63
  6. Step 6: Final answer
    x = 17,615.59

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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.