Home / 13,785.15-20,668.15-7,548.10

Finding the Fourth Proportional to 13,785.15, 20,668.15 and 7,548.10

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Solution

The fourth proportional to 13,785.15, 20,668.15 and 7,548.10 is: 11,316.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.15 : 20,668.15 = 7,548.10 : x
  2. Step 2: Convert to fraction form
    13,785.15/20,668.15 = 7,548.10/x
  3. Step 3: Cross multiply
    13,785.15x = 20,668.15 × 7,548.10
  4. Step 4: Simplify right side
    13,785.15x = 156,005,192.47
  5. Step 5: Solve for x
    x = 156,005,192.47/13,785.15
  6. Step 6: Final answer
    x = 11,316.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.