Home / 21,130.80-29,160.50-11,699.37

Finding the Fourth Proportional to 21,130.80, 29,160.50 and 11,699.37

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Solution

The fourth proportional to 21,130.80, 29,160.50 and 11,699.37 is: 16,145.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.80 : 29,160.50 = 11,699.37 : x
  2. Step 2: Convert to fraction form
    21,130.80/29,160.50 = 11,699.37/x
  3. Step 3: Cross multiply
    21,130.80x = 29,160.50 × 11,699.37
  4. Step 4: Simplify right side
    21,130.80x = 341,159,420.39
  5. Step 5: Solve for x
    x = 341,159,420.39/21,130.80
  6. Step 6: Final answer
    x = 16,145.13

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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.