Home / 21,076.50-31,569.78-13,658.94

Finding the Fourth Proportional to 21,076.50, 31,569.78 and 13,658.94

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Solution

The fourth proportional to 21,076.50, 31,569.78 and 13,658.94 is: 20,459.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.50 : 31,569.78 = 13,658.94 : x
  2. Step 2: Convert to fraction form
    21,076.50/31,569.78 = 13,658.94/x
  3. Step 3: Cross multiply
    21,076.50x = 31,569.78 × 13,658.94
  4. Step 4: Simplify right side
    21,076.50x = 431,209,730.83
  5. Step 5: Solve for x
    x = 431,209,730.83/21,076.50
  6. Step 6: Final answer
    x = 20,459.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.