Home / 21,530.09-29,711.50-11,969.69

Finding the Fourth Proportional to 21,530.09, 29,711.50 and 11,969.69

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Solution

The fourth proportional to 21,530.09, 29,711.50 and 11,969.69 is: 16,518.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.09 : 29,711.50 = 11,969.69 : x
  2. Step 2: Convert to fraction form
    21,530.09/29,711.50 = 11,969.69/x
  3. Step 3: Cross multiply
    21,530.09x = 29,711.50 × 11,969.69
  4. Step 4: Simplify right side
    21,530.09x = 355,637,265.95
  5. Step 5: Solve for x
    x = 355,637,265.95/21,530.09
  6. Step 6: Final answer
    x = 16,518.15

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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.