Home / 12,116.90-16,720.17-7,082.30

Finding the Fourth Proportional to 12,116.90, 16,720.17 and 7,082.30

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Solution

The fourth proportional to 12,116.90, 16,720.17 and 7,082.30 is: 9,772.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,116.90 : 16,720.17 = 7,082.30 : x
  2. Step 2: Convert to fraction form
    12,116.90/16,720.17 = 7,082.30/x
  3. Step 3: Cross multiply
    12,116.90x = 16,720.17 × 7,082.30
  4. Step 4: Simplify right side
    12,116.90x = 118,417,259.99
  5. Step 5: Solve for x
    x = 118,417,259.99/12,116.90
  6. Step 6: Final answer
    x = 9,772.90

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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.