Home / 21,579.36-29,780.10-12,148.26

Finding the Fourth Proportional to 21,579.36, 29,780.10 and 12,148.26

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Solution

The fourth proportional to 21,579.36, 29,780.10 and 12,148.26 is: 16,764.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.36 : 29,780.10 = 12,148.26 : x
  2. Step 2: Convert to fraction form
    21,579.36/29,780.10 = 12,148.26/x
  3. Step 3: Cross multiply
    21,579.36x = 29,780.10 × 12,148.26
  4. Step 4: Simplify right side
    21,579.36x = 361,776,397.63
  5. Step 5: Solve for x
    x = 361,776,397.63/21,579.36
  6. Step 6: Final answer
    x = 16,764.93

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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.