Home / 15,405-21,258.90-9,819.24

Finding the Fourth Proportional to 15,405, 21,258.90 and 9,819.24

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Solution

The fourth proportional to 15,405, 21,258.90 and 9,819.24 is: 13,550.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405 : 21,258.90 = 9,819.24 : x
  2. Step 2: Convert to fraction form
    15,405/21,258.90 = 9,819.24/x
  3. Step 3: Cross multiply
    15,405x = 21,258.90 × 9,819.24
  4. Step 4: Simplify right side
    15,405x = 208,746,241.24
  5. Step 5: Solve for x
    x = 208,746,241.24/15,405
  6. Step 6: Final answer
    x = 13,550.55

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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.