Home / 21,269.78-29,355.56-12,776.63

Finding the Fourth Proportional to 21,269.78, 29,355.56 and 12,776.63

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Solution

The fourth proportional to 21,269.78, 29,355.56 and 12,776.63 is: 17,633.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.78 : 29,355.56 = 12,776.63 : x
  2. Step 2: Convert to fraction form
    21,269.78/29,355.56 = 12,776.63/x
  3. Step 3: Cross multiply
    21,269.78x = 29,355.56 × 12,776.63
  4. Step 4: Simplify right side
    21,269.78x = 375,064,917.90
  5. Step 5: Solve for x
    x = 375,064,917.90/21,269.78
  6. Step 6: Final answer
    x = 17,633.70

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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.