Home / 21,556.89-29,746.90-12,123.63

Finding the Fourth Proportional to 21,556.89, 29,746.90 and 12,123.63

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Solution

The fourth proportional to 21,556.89, 29,746.90 and 12,123.63 is: 16,729.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,556.89 : 29,746.90 = 12,123.63 : x
  2. Step 2: Convert to fraction form
    21,556.89/29,746.90 = 12,123.63/x
  3. Step 3: Cross multiply
    21,556.89x = 29,746.90 × 12,123.63
  4. Step 4: Simplify right side
    21,556.89x = 360,640,409.25
  5. Step 5: Solve for x
    x = 360,640,409.25/21,556.89
  6. Step 6: Final answer
    x = 16,729.70

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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.