Home / 21,115.62-29,134.99-13,461.80

Finding the Fourth Proportional to 21,115.62, 29,134.99 and 13,461.80

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Solution

The fourth proportional to 21,115.62, 29,134.99 and 13,461.80 is: 18,574.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.62 : 29,134.99 = 13,461.80 : x
  2. Step 2: Convert to fraction form
    21,115.62/29,134.99 = 13,461.80/x
  3. Step 3: Cross multiply
    21,115.62x = 29,134.99 × 13,461.80
  4. Step 4: Simplify right side
    21,115.62x = 392,209,525.36
  5. Step 5: Solve for x
    x = 392,209,525.36/21,115.62
  6. Step 6: Final answer
    x = 18,574.38

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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.