Home / 21,717.14-29,970.21-12,156.98

Finding the Fourth Proportional to 21,717.14, 29,970.21 and 12,156.98

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Solution

The fourth proportional to 21,717.14, 29,970.21 and 12,156.98 is: 16,776.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,717.14 : 29,970.21 = 12,156.98 : x
  2. Step 2: Convert to fraction form
    21,717.14/29,970.21 = 12,156.98/x
  3. Step 3: Cross multiply
    21,717.14x = 29,970.21 × 12,156.98
  4. Step 4: Simplify right side
    21,717.14x = 364,347,093.71
  5. Step 5: Solve for x
    x = 364,347,093.71/21,717.14
  6. Step 6: Final answer
    x = 16,776.94

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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.