Home / 13,416.78-20,139.84-9,895.80

Finding the Fourth Proportional to 13,416.78, 20,139.84 and 9,895.80

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Solution

The fourth proportional to 13,416.78, 20,139.84 and 9,895.80 is: 14,854.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.78 : 20,139.84 = 9,895.80 : x
  2. Step 2: Convert to fraction form
    13,416.78/20,139.84 = 9,895.80/x
  3. Step 3: Cross multiply
    13,416.78x = 20,139.84 × 9,895.80
  4. Step 4: Simplify right side
    13,416.78x = 199,299,828.67
  5. Step 5: Solve for x
    x = 199,299,828.67/13,416.78
  6. Step 6: Final answer
    x = 14,854.52

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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.