Home / 13,137.52-18,129.76-9,783.20

Finding the Fourth Proportional to 13,137.52, 18,129.76 and 9,783.20

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Solution

The fourth proportional to 13,137.52, 18,129.76 and 9,783.20 is: 13,500.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.52 : 18,129.76 = 9,783.20 : x
  2. Step 2: Convert to fraction form
    13,137.52/18,129.76 = 9,783.20/x
  3. Step 3: Cross multiply
    13,137.52x = 18,129.76 × 9,783.20
  4. Step 4: Simplify right side
    13,137.52x = 177,367,068.03
  5. Step 5: Solve for x
    x = 177,367,068.03/13,137.52
  6. Step 6: Final answer
    x = 13,500.80

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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.