Home / 15,299.81-21,112.14-8,924.70

Finding the Fourth Proportional to 15,299.81, 21,112.14 and 8,924.70

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Solution

The fourth proportional to 15,299.81, 21,112.14 and 8,924.70 is: 12,315.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,299.81 : 21,112.14 = 8,924.70 : x
  2. Step 2: Convert to fraction form
    15,299.81/21,112.14 = 8,924.70/x
  3. Step 3: Cross multiply
    15,299.81x = 21,112.14 × 8,924.70
  4. Step 4: Simplify right side
    15,299.81x = 188,419,471.23
  5. Step 5: Solve for x
    x = 188,419,471.23/15,299.81
  6. Step 6: Final answer
    x = 12,315.16

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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.