Home / 15,513.42-21,409-8,799.32

Finding the Fourth Proportional to 15,513.42, 21,409 and 8,799.32

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Solution

The fourth proportional to 15,513.42, 21,409 and 8,799.32 is: 12,143.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.42 : 21,409 = 8,799.32 : x
  2. Step 2: Convert to fraction form
    15,513.42/21,409 = 8,799.32/x
  3. Step 3: Cross multiply
    15,513.42x = 21,409 × 8,799.32
  4. Step 4: Simplify right side
    15,513.42x = 188,384,641.88
  5. Step 5: Solve for x
    x = 188,384,641.88/15,513.42
  6. Step 6: Final answer
    x = 12,143.33

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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.