Home / 15,330.57-21,156.40-8,615.80

Finding the Fourth Proportional to 15,330.57, 21,156.40 and 8,615.80

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Solution

The fourth proportional to 15,330.57, 21,156.40 and 8,615.80 is: 11,889.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.57 : 21,156.40 = 8,615.80 : x
  2. Step 2: Convert to fraction form
    15,330.57/21,156.40 = 8,615.80/x
  3. Step 3: Cross multiply
    15,330.57x = 21,156.40 × 8,615.80
  4. Step 4: Simplify right side
    15,330.57x = 182,279,299.87
  5. Step 5: Solve for x
    x = 182,279,299.87/15,330.57
  6. Step 6: Final answer
    x = 11,889.92

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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.