Home / 20,659.84-28,513.20-11,708.80

Finding the Fourth Proportional to 20,659.84, 28,513.20 and 11,708.80

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Solution

The fourth proportional to 20,659.84, 28,513.20 and 11,708.80 is: 16,159.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.84 : 28,513.20 = 11,708.80 : x
  2. Step 2: Convert to fraction form
    20,659.84/28,513.20 = 11,708.80/x
  3. Step 3: Cross multiply
    20,659.84x = 28,513.20 × 11,708.80
  4. Step 4: Simplify right side
    20,659.84x = 333,855,356.16
  5. Step 5: Solve for x
    x = 333,855,356.16/20,659.84
  6. Step 6: Final answer
    x = 16,159.63

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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.