Home / 21,576.79-29,776.70-11,885.81

Finding the Fourth Proportional to 21,576.79, 29,776.70 and 11,885.81

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Solution

The fourth proportional to 21,576.79, 29,776.70 and 11,885.81 is: 16,402.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,576.79 : 29,776.70 = 11,885.81 : x
  2. Step 2: Convert to fraction form
    21,576.79/29,776.70 = 11,885.81/x
  3. Step 3: Cross multiply
    21,576.79x = 29,776.70 × 11,885.81
  4. Step 4: Simplify right side
    21,576.79x = 353,920,139.20
  5. Step 5: Solve for x
    x = 353,920,139.20/21,576.79
  6. Step 6: Final answer
    x = 16,402.82

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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.