Home / 15,300.79-21,116.16-8,928.92

Finding the Fourth Proportional to 15,300.79, 21,116.16 and 8,928.92

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Solution

The fourth proportional to 15,300.79, 21,116.16 and 8,928.92 is: 12,322.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,300.79 : 21,116.16 = 8,928.92 : x
  2. Step 2: Convert to fraction form
    15,300.79/21,116.16 = 8,928.92/x
  3. Step 3: Cross multiply
    15,300.79x = 21,116.16 × 8,928.92
  4. Step 4: Simplify right side
    15,300.79x = 188,544,556.14
  5. Step 5: Solve for x
    x = 188,544,556.14/15,300.79
  6. Step 6: Final answer
    x = 12,322.54

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Double scale
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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.