Home / 13,143.10-18,139.26-7,837.60

Finding the Fourth Proportional to 13,143.10, 18,139.26 and 7,837.60

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Solution

The fourth proportional to 13,143.10, 18,139.26 and 7,837.60 is: 10,816.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.10 : 18,139.26 = 7,837.60 : x
  2. Step 2: Convert to fraction form
    13,143.10/18,139.26 = 7,837.60/x
  3. Step 3: Cross multiply
    13,143.10x = 18,139.26 × 7,837.60
  4. Step 4: Simplify right side
    13,143.10x = 142,168,264.18
  5. Step 5: Solve for x
    x = 142,168,264.18/13,143.10
  6. Step 6: Final answer
    x = 10,816.95

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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.