Home / 15,137.04-20,887.48-8,421.60

Finding the Fourth Proportional to 15,137.04, 20,887.48 and 8,421.60

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Solution

The fourth proportional to 15,137.04, 20,887.48 and 8,421.60 is: 11,620.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,137.04 : 20,887.48 = 8,421.60 : x
  2. Step 2: Convert to fraction form
    15,137.04/20,887.48 = 8,421.60/x
  3. Step 3: Cross multiply
    15,137.04x = 20,887.48 × 8,421.60
  4. Step 4: Simplify right side
    15,137.04x = 175,906,001.57
  5. Step 5: Solve for x
    x = 175,906,001.57/15,137.04
  6. Step 6: Final answer
    x = 11,620.90

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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.