Home / 19,939.70-29,909.55-13,718.90

Finding the Fourth Proportional to 19,939.70, 29,909.55 and 13,718.90

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Solution

The fourth proportional to 19,939.70, 29,909.55 and 13,718.90 is: 20,578.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,939.70 : 29,909.55 = 13,718.90 : x
  2. Step 2: Convert to fraction form
    19,939.70/29,909.55 = 13,718.90/x
  3. Step 3: Cross multiply
    19,939.70x = 29,909.55 × 13,718.90
  4. Step 4: Simplify right side
    19,939.70x = 410,326,125.50
  5. Step 5: Solve for x
    x = 410,326,125.50/19,939.70
  6. Step 6: Final answer
    x = 20,578.35

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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.