Home / 20,708.56-28,579.98-12,750.58

Finding the Fourth Proportional to 20,708.56, 28,579.98 and 12,750.58

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Solution

The fourth proportional to 20,708.56, 28,579.98 and 12,750.58 is: 17,597.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.56 : 28,579.98 = 12,750.58 : x
  2. Step 2: Convert to fraction form
    20,708.56/28,579.98 = 12,750.58/x
  3. Step 3: Cross multiply
    20,708.56x = 28,579.98 × 12,750.58
  4. Step 4: Simplify right side
    20,708.56x = 364,411,321.39
  5. Step 5: Solve for x
    x = 364,411,321.39/20,708.56
  6. Step 6: Final answer
    x = 17,597.13

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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.