Home / 12,899.58-19,348.65-5,109.18

Finding the Fourth Proportional to 12,899.58, 19,348.65 and 5,109.18

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Solution

The fourth proportional to 12,899.58, 19,348.65 and 5,109.18 is: 7,663.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,899.58 : 19,348.65 = 5,109.18 : x
  2. Step 2: Convert to fraction form
    12,899.58/19,348.65 = 5,109.18/x
  3. Step 3: Cross multiply
    12,899.58x = 19,348.65 × 5,109.18
  4. Step 4: Simplify right side
    12,899.58x = 98,855,735.61
  5. Step 5: Solve for x
    x = 98,855,735.61/12,899.58
  6. Step 6: Final answer
    x = 7,663.48

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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.