Home / 20,991.84-28,967.64-11,558.58

Finding the Fourth Proportional to 20,991.84, 28,967.64 and 11,558.58

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Solution

The fourth proportional to 20,991.84, 28,967.64 and 11,558.58 is: 15,950.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.84 : 28,967.64 = 11,558.58 : x
  2. Step 2: Convert to fraction form
    20,991.84/28,967.64 = 11,558.58/x
  3. Step 3: Cross multiply
    20,991.84x = 28,967.64 × 11,558.58
  4. Step 4: Simplify right side
    20,991.84x = 334,824,784.35
  5. Step 5: Solve for x
    x = 334,824,784.35/20,991.84
  6. Step 6: Final answer
    x = 15,950.24

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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.