Home / 21,555.37-29,746.12-12,123.94

Finding the Fourth Proportional to 21,555.37, 29,746.12 and 12,123.94

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Solution

The fourth proportional to 21,555.37, 29,746.12 and 12,123.94 is: 16,730.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.37 : 29,746.12 = 12,123.94 : x
  2. Step 2: Convert to fraction form
    21,555.37/29,746.12 = 12,123.94/x
  3. Step 3: Cross multiply
    21,555.37x = 29,746.12 × 12,123.94
  4. Step 4: Simplify right side
    21,555.37x = 360,640,174.11
  5. Step 5: Solve for x
    x = 360,640,174.11/21,555.37
  6. Step 6: Final answer
    x = 16,730.87

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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.