Home / 20,607.05-28,429.68-13,445.39

Finding the Fourth Proportional to 20,607.05, 28,429.68 and 13,445.39

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Solution

The fourth proportional to 20,607.05, 28,429.68 and 13,445.39 is: 18,549.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,607.05 : 28,429.68 = 13,445.39 : x
  2. Step 2: Convert to fraction form
    20,607.05/28,429.68 = 13,445.39/x
  3. Step 3: Cross multiply
    20,607.05x = 28,429.68 × 13,445.39
  4. Step 4: Simplify right side
    20,607.05x = 382,248,135.18
  5. Step 5: Solve for x
    x = 382,248,135.18/20,607.05
  6. Step 6: Final answer
    x = 18,549.39

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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.