Home / 20,887.12-28,823.70-11,455.84

Finding the Fourth Proportional to 20,887.12, 28,823.70 and 11,455.84

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Solution

The fourth proportional to 20,887.12, 28,823.70 and 11,455.84 is: 15,808.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.12 : 28,823.70 = 11,455.84 : x
  2. Step 2: Convert to fraction form
    20,887.12/28,823.70 = 11,455.84/x
  3. Step 3: Cross multiply
    20,887.12x = 28,823.70 × 11,455.84
  4. Step 4: Simplify right side
    20,887.12x = 330,199,695.41
  5. Step 5: Solve for x
    x = 330,199,695.41/20,887.12
  6. Step 6: Final answer
    x = 15,808.77

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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.