Home / 21,715.48-29,965.92-12,153.76

Finding the Fourth Proportional to 21,715.48, 29,965.92 and 12,153.76

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Solution

The fourth proportional to 21,715.48, 29,965.92 and 12,153.76 is: 16,771.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.48 : 29,965.92 = 12,153.76 : x
  2. Step 2: Convert to fraction form
    21,715.48/29,965.92 = 12,153.76/x
  3. Step 3: Cross multiply
    21,715.48x = 29,965.92 × 12,153.76
  4. Step 4: Simplify right side
    21,715.48x = 364,198,599.86
  5. Step 5: Solve for x
    x = 364,198,599.86/21,715.48
  6. Step 6: Final answer
    x = 16,771.38

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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.