Home / 20,805.77-28,710.53-11,731.46

Finding the Fourth Proportional to 20,805.77, 28,710.53 and 11,731.46

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Solution

The fourth proportional to 20,805.77, 28,710.53 and 11,731.46 is: 16,188.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.77 : 28,710.53 = 11,731.46 : x
  2. Step 2: Convert to fraction form
    20,805.77/28,710.53 = 11,731.46/x
  3. Step 3: Cross multiply
    20,805.77x = 28,710.53 × 11,731.46
  4. Step 4: Simplify right side
    20,805.77x = 336,816,323.81
  5. Step 5: Solve for x
    x = 336,816,323.81/20,805.77
  6. Step 6: Final answer
    x = 16,188.60

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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.