Home / 13,929.57-20,899.69-8,386.88

Finding the Fourth Proportional to 13,929.57, 20,899.69 and 8,386.88

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Solution

The fourth proportional to 13,929.57, 20,899.69 and 8,386.88 is: 12,583.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.57 : 20,899.69 = 8,386.88 : x
  2. Step 2: Convert to fraction form
    13,929.57/20,899.69 = 8,386.88/x
  3. Step 3: Cross multiply
    13,929.57x = 20,899.69 × 8,386.88
  4. Step 4: Simplify right side
    13,929.57x = 175,283,066.60
  5. Step 5: Solve for x
    x = 175,283,066.60/13,929.57
  6. Step 6: Final answer
    x = 12,583.52

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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.