Home / 19,139.88-28,715.40-11,749.08

Finding the Fourth Proportional to 19,139.88, 28,715.40 and 11,749.08

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Solution

The fourth proportional to 19,139.88, 28,715.40 and 11,749.08 is: 17,627.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,139.88 : 28,715.40 = 11,749.08 : x
  2. Step 2: Convert to fraction form
    19,139.88/28,715.40 = 11,749.08/x
  3. Step 3: Cross multiply
    19,139.88x = 28,715.40 × 11,749.08
  4. Step 4: Simplify right side
    19,139.88x = 337,379,531.83
  5. Step 5: Solve for x
    x = 337,379,531.83/19,139.88
  6. Step 6: Final answer
    x = 17,627.05

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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.