Home / 9,291.20-12,821.41-5,312.75

Finding the Fourth Proportional to 9,291.20, 12,821.41 and 5,312.75

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Solution

The fourth proportional to 9,291.20, 12,821.41 and 5,312.75 is: 7,331.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,291.20 : 12,821.41 = 5,312.75 : x
  2. Step 2: Convert to fraction form
    9,291.20/12,821.41 = 5,312.75/x
  3. Step 3: Cross multiply
    9,291.20x = 12,821.41 × 5,312.75
  4. Step 4: Simplify right side
    9,291.20x = 68,116,984.67
  5. Step 5: Solve for x
    x = 68,116,984.67/9,291.20
  6. Step 6: Final answer
    x = 7,331.34

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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.