Home / 15,330.09-21,156.11-8,615.59

Finding the Fourth Proportional to 15,330.09, 21,156.11 and 8,615.59

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Solution

The fourth proportional to 15,330.09, 21,156.11 and 8,615.59 is: 11,889.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.09 : 21,156.11 = 8,615.59 : x
  2. Step 2: Convert to fraction form
    15,330.09/21,156.11 = 8,615.59/x
  3. Step 3: Cross multiply
    15,330.09x = 21,156.11 × 8,615.59
  4. Step 4: Simplify right side
    15,330.09x = 182,272,369.75
  5. Step 5: Solve for x
    x = 182,272,369.75/15,330.09
  6. Step 6: Final answer
    x = 11,889.84

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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.