Home / 20,887-28,824.08-11,455.60

Finding the Fourth Proportional to 20,887, 28,824.08 and 11,455.60

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Solution

The fourth proportional to 20,887, 28,824.08 and 11,455.60 is: 15,808.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887 : 28,824.08 = 11,455.60 : x
  2. Step 2: Convert to fraction form
    20,887/28,824.08 = 11,455.60/x
  3. Step 3: Cross multiply
    20,887x = 28,824.08 × 11,455.60
  4. Step 4: Simplify right side
    20,887x = 330,197,130.85
  5. Step 5: Solve for x
    x = 330,197,130.85/20,887
  6. Step 6: Final answer
    x = 15,808.74

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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.