Home / 21,305.76-29,404.80-11,875.20

Finding the Fourth Proportional to 21,305.76, 29,404.80 and 11,875.20

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Solution

The fourth proportional to 21,305.76, 29,404.80 and 11,875.20 is: 16,389.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.76 : 29,404.80 = 11,875.20 : x
  2. Step 2: Convert to fraction form
    21,305.76/29,404.80 = 11,875.20/x
  3. Step 3: Cross multiply
    21,305.76x = 29,404.80 × 11,875.20
  4. Step 4: Simplify right side
    21,305.76x = 349,187,880.96
  5. Step 5: Solve for x
    x = 349,187,880.96/21,305.76
  6. Step 6: Final answer
    x = 16,389.37

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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.