Home / 9,131.16-12,609.53-6,720.00

Finding the Fourth Proportional to 9,131.16, 12,609.53 and 6,720.00

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Solution

The fourth proportional to 9,131.16, 12,609.53 and 6,720.00 is: 9,279.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,131.16 : 12,609.53 = 6,720.00 : x
  2. Step 2: Convert to fraction form
    9,131.16/12,609.53 = 6,720.00/x
  3. Step 3: Cross multiply
    9,131.16x = 12,609.53 × 6,720.00
  4. Step 4: Simplify right side
    9,131.16x = 84,736,004.81
  5. Step 5: Solve for x
    x = 84,736,004.81/9,131.16
  6. Step 6: Final answer
    x = 9,279.87

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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.