Home / 21,130.70-29,154.14-12,174.98

Finding the Fourth Proportional to 21,130.70, 29,154.14 and 12,174.98

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Solution

The fourth proportional to 21,130.70, 29,154.14 and 12,174.98 is: 16,797.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.70 : 29,154.14 = 12,174.98 : x
  2. Step 2: Convert to fraction form
    21,130.70/29,154.14 = 12,174.98/x
  3. Step 3: Cross multiply
    21,130.70x = 29,154.14 × 12,174.98
  4. Step 4: Simplify right side
    21,130.70x = 354,951,071.42
  5. Step 5: Solve for x
    x = 354,951,071.42/21,130.70
  6. Step 6: Final answer
    x = 16,797.89

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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.