Home / 21,199.64-29,240.30-13,130.68

Finding the Fourth Proportional to 21,199.64, 29,240.30 and 13,130.68

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Solution

The fourth proportional to 21,199.64, 29,240.30 and 13,130.68 is: 18,110.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.64 : 29,240.30 = 13,130.68 : x
  2. Step 2: Convert to fraction form
    21,199.64/29,240.30 = 13,130.68/x
  3. Step 3: Cross multiply
    21,199.64x = 29,240.30 × 13,130.68
  4. Step 4: Simplify right side
    21,199.64x = 383,945,022.40
  5. Step 5: Solve for x
    x = 383,945,022.40/21,199.64
  6. Step 6: Final answer
    x = 18,110.92

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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.