Home / 13,127.78-18,116.52-7,159.75

Finding the Fourth Proportional to 13,127.78, 18,116.52 and 7,159.75

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Solution

The fourth proportional to 13,127.78, 18,116.52 and 7,159.75 is: 9,880.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.78 : 18,116.52 = 7,159.75 : x
  2. Step 2: Convert to fraction form
    13,127.78/18,116.52 = 7,159.75/x
  3. Step 3: Cross multiply
    13,127.78x = 18,116.52 × 7,159.75
  4. Step 4: Simplify right side
    13,127.78x = 129,709,754.07
  5. Step 5: Solve for x
    x = 129,709,754.07/13,127.78
  6. Step 6: Final answer
    x = 9,880.56

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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.