Home / 15,091.48-20,818.38-9,119.80

Finding the Fourth Proportional to 15,091.48, 20,818.38 and 9,119.80

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Solution

The fourth proportional to 15,091.48, 20,818.38 and 9,119.80 is: 12,580.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,091.48 : 20,818.38 = 9,119.80 : x
  2. Step 2: Convert to fraction form
    15,091.48/20,818.38 = 9,119.80/x
  3. Step 3: Cross multiply
    15,091.48x = 20,818.38 × 9,119.80
  4. Step 4: Simplify right side
    15,091.48x = 189,859,461.92
  5. Step 5: Solve for x
    x = 189,859,461.92/15,091.48
  6. Step 6: Final answer
    x = 12,580.57

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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.