Home / 21,130.13-29,159.78-11,698.89

Finding the Fourth Proportional to 21,130.13, 29,159.78 and 11,698.89

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Solution

The fourth proportional to 21,130.13, 29,159.78 and 11,698.89 is: 16,144.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.13 : 29,159.78 = 11,698.89 : x
  2. Step 2: Convert to fraction form
    21,130.13/29,159.78 = 11,698.89/x
  3. Step 3: Cross multiply
    21,130.13x = 29,159.78 × 11,698.89
  4. Step 4: Simplify right side
    21,130.13x = 341,137,000.15
  5. Step 5: Solve for x
    x = 341,137,000.15/21,130.13
  6. Step 6: Final answer
    x = 16,144.58

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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.