Home / 15,618.24-21,543.84-13,518.72

Finding the Fourth Proportional to 15,618.24, 21,543.84 and 13,518.72

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Solution

The fourth proportional to 15,618.24, 21,543.84 and 13,518.72 is: 18,647.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,618.24 : 21,543.84 = 13,518.72 : x
  2. Step 2: Convert to fraction form
    15,618.24/21,543.84 = 13,518.72/x
  3. Step 3: Cross multiply
    15,618.24x = 21,543.84 × 13,518.72
  4. Step 4: Simplify right side
    15,618.24x = 291,245,140.68
  5. Step 5: Solve for x
    x = 291,245,140.68/15,618.24
  6. Step 6: Final answer
    x = 18,647.76

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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.