Home / 9,420.28-13,000.20-5,228.80

Finding the Fourth Proportional to 9,420.28, 13,000.20 and 5,228.80

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Solution

The fourth proportional to 9,420.28, 13,000.20 and 5,228.80 is: 7,215.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,420.28 : 13,000.20 = 5,228.80 : x
  2. Step 2: Convert to fraction form
    9,420.28/13,000.20 = 5,228.80/x
  3. Step 3: Cross multiply
    9,420.28x = 13,000.20 × 5,228.80
  4. Step 4: Simplify right side
    9,420.28x = 67,975,445.76
  5. Step 5: Solve for x
    x = 67,975,445.76/9,420.28
  6. Step 6: Final answer
    x = 7,215.86

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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.