Home / 21,130.45-29,160.94-11,699.02

Finding the Fourth Proportional to 21,130.45, 29,160.94 and 11,699.02

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Solution

The fourth proportional to 21,130.45, 29,160.94 and 11,699.02 is: 16,145.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.45 : 29,160.94 = 11,699.02 : x
  2. Step 2: Convert to fraction form
    21,130.45/29,160.94 = 11,699.02/x
  3. Step 3: Cross multiply
    21,130.45x = 29,160.94 × 11,699.02
  4. Step 4: Simplify right side
    21,130.45x = 341,154,252.48
  5. Step 5: Solve for x
    x = 341,154,252.48/21,130.45
  6. Step 6: Final answer
    x = 16,145.15

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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.