Home / 21,945.60-32,875.20-13,154.40

Finding the Fourth Proportional to 21,945.60, 32,875.20 and 13,154.40

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Solution

The fourth proportional to 21,945.60, 32,875.20 and 13,154.40 is: 19,705.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945.60 : 32,875.20 = 13,154.40 : x
  2. Step 2: Convert to fraction form
    21,945.60/32,875.20 = 13,154.40/x
  3. Step 3: Cross multiply
    21,945.60x = 32,875.20 × 13,154.40
  4. Step 4: Simplify right side
    21,945.60x = 432,453,530.88
  5. Step 5: Solve for x
    x = 432,453,530.88/21,945.60
  6. Step 6: Final answer
    x = 19,705.71

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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.