Home / 21,719.07-29,969.13-12,158.46

Finding the Fourth Proportional to 21,719.07, 29,969.13 and 12,158.46

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Solution

The fourth proportional to 21,719.07, 29,969.13 and 12,158.46 is: 16,776.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.07 : 29,969.13 = 12,158.46 : x
  2. Step 2: Convert to fraction form
    21,719.07/29,969.13 = 12,158.46/x
  3. Step 3: Cross multiply
    21,719.07x = 29,969.13 × 12,158.46
  4. Step 4: Simplify right side
    21,719.07x = 364,378,468.34
  5. Step 5: Solve for x
    x = 364,378,468.34/21,719.07
  6. Step 6: Final answer
    x = 16,776.89

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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.