Home / 13,541.08-18,686.80-7,876.12

Finding the Fourth Proportional to 13,541.08, 18,686.80 and 7,876.12

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Solution

The fourth proportional to 13,541.08, 18,686.80 and 7,876.12 is: 10,869.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,541.08 : 18,686.80 = 7,876.12 : x
  2. Step 2: Convert to fraction form
    13,541.08/18,686.80 = 7,876.12/x
  3. Step 3: Cross multiply
    13,541.08x = 18,686.80 × 7,876.12
  4. Step 4: Simplify right side
    13,541.08x = 147,179,479.22
  5. Step 5: Solve for x
    x = 147,179,479.22/13,541.08
  6. Step 6: Final answer
    x = 10,869.11

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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.