Home / 8,967.40-13,455.06-3,128.20

Finding the Fourth Proportional to 8,967.40, 13,455.06 and 3,128.20

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Solution

The fourth proportional to 8,967.40, 13,455.06 and 3,128.20 is: 4,693.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,967.40 : 13,455.06 = 3,128.20 : x
  2. Step 2: Convert to fraction form
    8,967.40/13,455.06 = 3,128.20/x
  3. Step 3: Cross multiply
    8,967.40x = 13,455.06 × 3,128.20
  4. Step 4: Simplify right side
    8,967.40x = 42,090,118.69
  5. Step 5: Solve for x
    x = 42,090,118.69/8,967.40
  6. Step 6: Final answer
    x = 4,693.68

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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.