Home / 14,109.60-21,164.40-8,938.40

Finding the Fourth Proportional to 14,109.60, 21,164.40 and 8,938.40

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Solution

The fourth proportional to 14,109.60, 21,164.40 and 8,938.40 is: 13,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,109.60 : 21,164.40 = 8,938.40 : x
  2. Step 2: Convert to fraction form
    14,109.60/21,164.40 = 8,938.40/x
  3. Step 3: Cross multiply
    14,109.60x = 21,164.40 × 8,938.40
  4. Step 4: Simplify right side
    14,109.60x = 189,175,872.96
  5. Step 5: Solve for x
    x = 189,175,872.96/14,109.60
  6. Step 6: Final answer
    x = 13,407.60

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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.