Home / 20,595.48-28,419.66-12,638.04

Finding the Fourth Proportional to 20,595.48, 28,419.66 and 12,638.04

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Solution

The fourth proportional to 20,595.48, 28,419.66 and 12,638.04 is: 17,439.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,595.48 : 28,419.66 = 12,638.04 : x
  2. Step 2: Convert to fraction form
    20,595.48/28,419.66 = 12,638.04/x
  3. Step 3: Cross multiply
    20,595.48x = 28,419.66 × 12,638.04
  4. Step 4: Simplify right side
    20,595.48x = 359,168,799.87
  5. Step 5: Solve for x
    x = 359,168,799.87/20,595.48
  6. Step 6: Final answer
    x = 17,439.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.