Home / 9,291.31-12,821.90-5,313.40

Finding the Fourth Proportional to 9,291.31, 12,821.90 and 5,313.40

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Solution

The fourth proportional to 9,291.31, 12,821.90 and 5,313.40 is: 7,332.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,291.31 : 12,821.90 = 5,313.40 : x
  2. Step 2: Convert to fraction form
    9,291.31/12,821.90 = 5,313.40/x
  3. Step 3: Cross multiply
    9,291.31x = 12,821.90 × 5,313.40
  4. Step 4: Simplify right side
    9,291.31x = 68,127,824.84
  5. Step 5: Solve for x
    x = 68,127,824.84/9,291.31
  6. Step 6: Final answer
    x = 7,332.43

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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.