Home / 20,966.50-28,933.77-11,535.40

Finding the Fourth Proportional to 20,966.50, 28,933.77 and 11,535.40

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Solution

The fourth proportional to 20,966.50, 28,933.77 and 11,535.40 is: 15,918.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.50 : 28,933.77 = 11,535.40 : x
  2. Step 2: Convert to fraction form
    20,966.50/28,933.77 = 11,535.40/x
  3. Step 3: Cross multiply
    20,966.50x = 28,933.77 × 11,535.40
  4. Step 4: Simplify right side
    20,966.50x = 333,762,610.46
  5. Step 5: Solve for x
    x = 333,762,610.46/20,966.50
  6. Step 6: Final answer
    x = 15,918.85

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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.