Home / 13,085.40-18,057.87-7,117.11

Finding the Fourth Proportional to 13,085.40, 18,057.87 and 7,117.11

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Solution

The fourth proportional to 13,085.40, 18,057.87 and 7,117.11 is: 9,821.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,085.40 : 18,057.87 = 7,117.11 : x
  2. Step 2: Convert to fraction form
    13,085.40/18,057.87 = 7,117.11/x
  3. Step 3: Cross multiply
    13,085.40x = 18,057.87 × 7,117.11
  4. Step 4: Simplify right side
    13,085.40x = 128,519,847.16
  5. Step 5: Solve for x
    x = 128,519,847.16/13,085.40
  6. Step 6: Final answer
    x = 9,821.62

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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.