Home / 18,720.33-28,077.45-6,240.45

Finding the Fourth Proportional to 18,720.33, 28,077.45 and 6,240.45

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Solution

The fourth proportional to 18,720.33, 28,077.45 and 6,240.45 is: 9,359.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.33 : 28,077.45 = 6,240.45 : x
  2. Step 2: Convert to fraction form
    18,720.33/28,077.45 = 6,240.45/x
  3. Step 3: Cross multiply
    18,720.33x = 28,077.45 × 6,240.45
  4. Step 4: Simplify right side
    18,720.33x = 175,216,004.74
  5. Step 5: Solve for x
    x = 175,216,004.74/18,720.33
  6. Step 6: Final answer
    x = 9,359.67

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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.