Home / 8,920.41-12,308.91-5,143.28

Finding the Fourth Proportional to 8,920.41, 12,308.91 and 5,143.28

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Solution

The fourth proportional to 8,920.41, 12,308.91 and 5,143.28 is: 7,097.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.41 : 12,308.91 = 5,143.28 : x
  2. Step 2: Convert to fraction form
    8,920.41/12,308.91 = 5,143.28/x
  3. Step 3: Cross multiply
    8,920.41x = 12,308.91 × 5,143.28
  4. Step 4: Simplify right side
    8,920.41x = 63,308,109.08
  5. Step 5: Solve for x
    x = 63,308,109.08/8,920.41
  6. Step 6: Final answer
    x = 7,097.00

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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.