Home / 15,123.16-20,859.60-9,144.46

Finding the Fourth Proportional to 15,123.16, 20,859.60 and 9,144.46

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Solution

The fourth proportional to 15,123.16, 20,859.60 and 9,144.46 is: 12,613.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,123.16 : 20,859.60 = 9,144.46 : x
  2. Step 2: Convert to fraction form
    15,123.16/20,859.60 = 9,144.46/x
  3. Step 3: Cross multiply
    15,123.16x = 20,859.60 × 9,144.46
  4. Step 4: Simplify right side
    15,123.16x = 190,749,777.82
  5. Step 5: Solve for x
    x = 190,749,777.82/15,123.16
  6. Step 6: Final answer
    x = 12,613.09

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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.