Home / 13,543.12-18,647.95-11,855.08

Finding the Fourth Proportional to 13,543.12, 18,647.95 and 11,855.08

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Solution

The fourth proportional to 13,543.12, 18,647.95 and 11,855.08 is: 16,323.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,543.12 : 18,647.95 = 11,855.08 : x
  2. Step 2: Convert to fraction form
    13,543.12/18,647.95 = 11,855.08/x
  3. Step 3: Cross multiply
    13,543.12x = 18,647.95 × 11,855.08
  4. Step 4: Simplify right side
    13,543.12x = 221,072,939.09
  5. Step 5: Solve for x
    x = 221,072,939.09/13,543.12
  6. Step 6: Final answer
    x = 16,323.63

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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.