Home / 20,887.12-28,824.48-11,455.52

Finding the Fourth Proportional to 20,887.12, 28,824.48 and 11,455.52

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Solution

The fourth proportional to 20,887.12, 28,824.48 and 11,455.52 is: 15,808.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.12 : 28,824.48 = 11,455.52 : x
  2. Step 2: Convert to fraction form
    20,887.12/28,824.48 = 11,455.52/x
  3. Step 3: Cross multiply
    20,887.12x = 28,824.48 × 11,455.52
  4. Step 4: Simplify right side
    20,887.12x = 330,199,407.13
  5. Step 5: Solve for x
    x = 330,199,407.13/20,887.12
  6. Step 6: Final answer
    x = 15,808.76

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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.