Home / 10,520.89-15,749.78-10,147.07

Finding the Fourth Proportional to 10,520.89, 15,749.78 and 10,147.07

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Solution

The fourth proportional to 10,520.89, 15,749.78 and 10,147.07 is: 15,190.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.89 : 15,749.78 = 10,147.07 : x
  2. Step 2: Convert to fraction form
    10,520.89/15,749.78 = 10,147.07/x
  3. Step 3: Cross multiply
    10,520.89x = 15,749.78 × 10,147.07
  4. Step 4: Simplify right side
    10,520.89x = 159,814,108.78
  5. Step 5: Solve for x
    x = 159,814,108.78/10,520.89
  6. Step 6: Final answer
    x = 15,190.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.