Home / 15,299.79-21,113.61-8,585.41

Finding the Fourth Proportional to 15,299.79, 21,113.61 and 8,585.41

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Solution

The fourth proportional to 15,299.79, 21,113.61 and 8,585.41 is: 11,847.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,299.79 : 21,113.61 = 8,585.41 : x
  2. Step 2: Convert to fraction form
    15,299.79/21,113.61 = 8,585.41/x
  3. Step 3: Cross multiply
    15,299.79x = 21,113.61 × 8,585.41
  4. Step 4: Simplify right side
    15,299.79x = 181,269,001.33
  5. Step 5: Solve for x
    x = 181,269,001.33/15,299.79
  6. Step 6: Final answer
    x = 11,847.81

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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.