Home / 13,287.55-18,336.15-7,319.09

Finding the Fourth Proportional to 13,287.55, 18,336.15 and 7,319.09

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Solution

The fourth proportional to 13,287.55, 18,336.15 and 7,319.09 is: 10,099.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.55 : 18,336.15 = 7,319.09 : x
  2. Step 2: Convert to fraction form
    13,287.55/18,336.15 = 7,319.09/x
  3. Step 3: Cross multiply
    13,287.55x = 18,336.15 × 7,319.09
  4. Step 4: Simplify right side
    13,287.55x = 134,203,957.36
  5. Step 5: Solve for x
    x = 134,203,957.36/13,287.55
  6. Step 6: Final answer
    x = 10,099.98

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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.