Home / 13,929.21-20,899.14-8,386.50

Finding the Fourth Proportional to 13,929.21, 20,899.14 and 8,386.50

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Solution

The fourth proportional to 13,929.21, 20,899.14 and 8,386.50 is: 12,582.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.21 : 20,899.14 = 8,386.50 : x
  2. Step 2: Convert to fraction form
    13,929.21/20,899.14 = 8,386.50/x
  3. Step 3: Cross multiply
    13,929.21x = 20,899.14 × 8,386.50
  4. Step 4: Simplify right side
    13,929.21x = 175,270,637.61
  5. Step 5: Solve for x
    x = 175,270,637.61/13,929.21
  6. Step 6: Final answer
    x = 12,582.96

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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.