Home / 20,571.10-30,856.75-4,988.72

Finding the Fourth Proportional to 20,571.10, 30,856.75 and 4,988.72

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Solution

The fourth proportional to 20,571.10, 30,856.75 and 4,988.72 is: 7,483.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.10 : 30,856.75 = 4,988.72 : x
  2. Step 2: Convert to fraction form
    20,571.10/30,856.75 = 4,988.72/x
  3. Step 3: Cross multiply
    20,571.10x = 30,856.75 × 4,988.72
  4. Step 4: Simplify right side
    20,571.10x = 153,935,660.92
  5. Step 5: Solve for x
    x = 153,935,660.92/20,571.10
  6. Step 6: Final answer
    x = 7,483.10

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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.