Home / 11,430.40-17,145.60-6,515.20

Finding the Fourth Proportional to 11,430.40, 17,145.60 and 6,515.20

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Solution

The fourth proportional to 11,430.40, 17,145.60 and 6,515.20 is: 9,772.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,430.40 : 17,145.60 = 6,515.20 : x
  2. Step 2: Convert to fraction form
    11,430.40/17,145.60 = 6,515.20/x
  3. Step 3: Cross multiply
    11,430.40x = 17,145.60 × 6,515.20
  4. Step 4: Simplify right side
    11,430.40x = 111,707,013.12
  5. Step 5: Solve for x
    x = 111,707,013.12/11,430.40
  6. Step 6: Final answer
    x = 9,772.80

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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.