Home / 21,586.65-29,789.55-12,155.28

Finding the Fourth Proportional to 21,586.65, 29,789.55 and 12,155.28

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Solution

The fourth proportional to 21,586.65, 29,789.55 and 12,155.28 is: 16,774.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,586.65 : 29,789.55 = 12,155.28 : x
  2. Step 2: Convert to fraction form
    21,586.65/29,789.55 = 12,155.28/x
  3. Step 3: Cross multiply
    21,586.65x = 29,789.55 × 12,155.28
  4. Step 4: Simplify right side
    21,586.65x = 362,100,321.32
  5. Step 5: Solve for x
    x = 362,100,321.32/21,586.65
  6. Step 6: Final answer
    x = 16,774.27

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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.