Home / 21,274.48-29,354.34-12,318.76

Finding the Fourth Proportional to 21,274.48, 29,354.34 and 12,318.76

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Solution

The fourth proportional to 21,274.48, 29,354.34 and 12,318.76 is: 16,997.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.48 : 29,354.34 = 12,318.76 : x
  2. Step 2: Convert to fraction form
    21,274.48/29,354.34 = 12,318.76/x
  3. Step 3: Cross multiply
    21,274.48x = 29,354.34 × 12,318.76
  4. Step 4: Simplify right side
    21,274.48x = 361,609,069.42
  5. Step 5: Solve for x
    x = 361,609,069.42/21,274.48
  6. Step 6: Final answer
    x = 16,997.32

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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.