Home / 21,506.72-29,678.48-11,947.04

Finding the Fourth Proportional to 21,506.72, 29,678.48 and 11,947.04

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Solution

The fourth proportional to 21,506.72, 29,678.48 and 11,947.04 is: 16,486.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,506.72 : 29,678.48 = 11,947.04 : x
  2. Step 2: Convert to fraction form
    21,506.72/29,678.48 = 11,947.04/x
  3. Step 3: Cross multiply
    21,506.72x = 29,678.48 × 11,947.04
  4. Step 4: Simplify right side
    21,506.72x = 354,569,987.70
  5. Step 5: Solve for x
    x = 354,569,987.70/21,506.72
  6. Step 6: Final answer
    x = 16,486.47

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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.