Home / 21,311.99-29,412.15-12,359.42

Finding the Fourth Proportional to 21,311.99, 29,412.15 and 12,359.42

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Solution

The fourth proportional to 21,311.99, 29,412.15 and 12,359.42 is: 17,056.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.99 : 29,412.15 = 12,359.42 : x
  2. Step 2: Convert to fraction form
    21,311.99/29,412.15 = 12,359.42/x
  3. Step 3: Cross multiply
    21,311.99x = 29,412.15 × 12,359.42
  4. Step 4: Simplify right side
    21,311.99x = 363,517,114.95
  5. Step 5: Solve for x
    x = 363,517,114.95/21,311.99
  6. Step 6: Final answer
    x = 17,056.93

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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.