Home / 13,085.20-18,057.54-7,116.88

Finding the Fourth Proportional to 13,085.20, 18,057.54 and 7,116.88

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Solution

The fourth proportional to 13,085.20, 18,057.54 and 7,116.88 is: 9,821.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,085.20 : 18,057.54 = 7,116.88 : x
  2. Step 2: Convert to fraction form
    13,085.20/18,057.54 = 7,116.88/x
  3. Step 3: Cross multiply
    13,085.20x = 18,057.54 × 7,116.88
  4. Step 4: Simplify right side
    13,085.20x = 128,513,345.28
  5. Step 5: Solve for x
    x = 128,513,345.28/13,085.20
  6. Step 6: Final answer
    x = 9,821.27

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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.