Home / 13,938.48-20,905.56-8,392.68

Finding the Fourth Proportional to 13,938.48, 20,905.56 and 8,392.68

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Solution

The fourth proportional to 13,938.48, 20,905.56 and 8,392.68 is: 12,587.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.48 : 20,905.56 = 8,392.68 : x
  2. Step 2: Convert to fraction form
    13,938.48/20,905.56 = 8,392.68/x
  3. Step 3: Cross multiply
    13,938.48x = 20,905.56 × 8,392.68
  4. Step 4: Simplify right side
    13,938.48x = 175,453,675.30
  5. Step 5: Solve for x
    x = 175,453,675.30/13,938.48
  6. Step 6: Final answer
    x = 12,587.72

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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.