Home / 9,420.05-13,000.12-5,228.30

Finding the Fourth Proportional to 9,420.05, 13,000.12 and 5,228.30

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Solution

The fourth proportional to 9,420.05, 13,000.12 and 5,228.30 is: 7,215.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,420.05 : 13,000.12 = 5,228.30 : x
  2. Step 2: Convert to fraction form
    9,420.05/13,000.12 = 5,228.30/x
  3. Step 3: Cross multiply
    9,420.05x = 13,000.12 × 5,228.30
  4. Step 4: Simplify right side
    9,420.05x = 67,968,488.40
  5. Step 5: Solve for x
    x = 67,968,488.40/9,420.05
  6. Step 6: Final answer
    x = 7,215.30

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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.