Home / 19,877.20-27,430.85-11,379.29

Finding the Fourth Proportional to 19,877.20, 27,430.85 and 11,379.29

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Solution

The fourth proportional to 19,877.20, 27,430.85 and 11,379.29 is: 15,703.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,877.20 : 27,430.85 = 11,379.29 : x
  2. Step 2: Convert to fraction form
    19,877.20/27,430.85 = 11,379.29/x
  3. Step 3: Cross multiply
    19,877.20x = 27,430.85 × 11,379.29
  4. Step 4: Simplify right side
    19,877.20x = 312,143,488.39
  5. Step 5: Solve for x
    x = 312,143,488.39/19,877.20
  6. Step 6: Final answer
    x = 15,703.60

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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.