Home / 20,962.81-28,929.13-11,531.37

Finding the Fourth Proportional to 20,962.81, 28,929.13 and 11,531.37

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Solution

The fourth proportional to 20,962.81, 28,929.13 and 11,531.37 is: 15,913.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.81 : 28,929.13 = 11,531.37 : x
  2. Step 2: Convert to fraction form
    20,962.81/28,929.13 = 11,531.37/x
  3. Step 3: Cross multiply
    20,962.81x = 28,929.13 × 11,531.37
  4. Step 4: Simplify right side
    20,962.81x = 333,592,472.98
  5. Step 5: Solve for x
    x = 333,592,472.98/20,962.81
  6. Step 6: Final answer
    x = 15,913.54

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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.