Home / 13,108.08-18,088.74-7,139.64

Finding the Fourth Proportional to 13,108.08, 18,088.74 and 7,139.64

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Solution

The fourth proportional to 13,108.08, 18,088.74 and 7,139.64 is: 9,852.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.08 : 18,088.74 = 7,139.64 : x
  2. Step 2: Convert to fraction form
    13,108.08/18,088.74 = 7,139.64/x
  3. Step 3: Cross multiply
    13,108.08x = 18,088.74 × 7,139.64
  4. Step 4: Simplify right side
    13,108.08x = 129,147,091.65
  5. Step 5: Solve for x
    x = 129,147,091.65/13,108.08
  6. Step 6: Final answer
    x = 9,852.48

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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.