Home / 12,720.36-17,535.66-8,931.99

Finding the Fourth Proportional to 12,720.36, 17,535.66 and 8,931.99

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Solution

The fourth proportional to 12,720.36, 17,535.66 and 8,931.99 is: 12,313.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.36 : 17,535.66 = 8,931.99 : x
  2. Step 2: Convert to fraction form
    12,720.36/17,535.66 = 8,931.99/x
  3. Step 3: Cross multiply
    12,720.36x = 17,535.66 × 8,931.99
  4. Step 4: Simplify right side
    12,720.36x = 156,628,339.76
  5. Step 5: Solve for x
    x = 156,628,339.76/12,720.36
  6. Step 6: Final answer
    x = 12,313.20

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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.