Home / 21,005.84-28,986.96-11,572.64

Finding the Fourth Proportional to 21,005.84, 28,986.96 and 11,572.64

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Solution

The fourth proportional to 21,005.84, 28,986.96 and 11,572.64 is: 15,969.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.84 : 28,986.96 = 11,572.64 : x
  2. Step 2: Convert to fraction form
    21,005.84/28,986.96 = 11,572.64/x
  3. Step 3: Cross multiply
    21,005.84x = 28,986.96 × 11,572.64
  4. Step 4: Simplify right side
    21,005.84x = 335,455,652.77
  5. Step 5: Solve for x
    x = 335,455,652.77/21,005.84
  6. Step 6: Final answer
    x = 15,969.64

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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.