Home / 15,243.89-21,036.78-8,529.80

Finding the Fourth Proportional to 15,243.89, 21,036.78 and 8,529.80

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Solution

The fourth proportional to 15,243.89, 21,036.78 and 8,529.80 is: 11,771.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,243.89 : 21,036.78 = 8,529.80 : x
  2. Step 2: Convert to fraction form
    15,243.89/21,036.78 = 8,529.80/x
  3. Step 3: Cross multiply
    15,243.89x = 21,036.78 × 8,529.80
  4. Step 4: Simplify right side
    15,243.89x = 179,439,420.86
  5. Step 5: Solve for x
    x = 179,439,420.86/15,243.89
  6. Step 6: Final answer
    x = 11,771.24

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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.