Home / 21,423.21-29,564.34-12,343.57

Finding the Fourth Proportional to 21,423.21, 29,564.34 and 12,343.57

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Solution

The fourth proportional to 21,423.21, 29,564.34 and 12,343.57 is: 17,034.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,423.21 : 29,564.34 = 12,343.57 : x
  2. Step 2: Convert to fraction form
    21,423.21/29,564.34 = 12,343.57/x
  3. Step 3: Cross multiply
    21,423.21x = 29,564.34 × 12,343.57
  4. Step 4: Simplify right side
    21,423.21x = 364,929,426.38
  5. Step 5: Solve for x
    x = 364,929,426.38/21,423.21
  6. Step 6: Final answer
    x = 17,034.30

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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.