Home / 15,861.09-21,867.57-13,646.76

Finding the Fourth Proportional to 15,861.09, 21,867.57 and 13,646.76

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Solution

The fourth proportional to 15,861.09, 21,867.57 and 13,646.76 is: 18,814.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,861.09 : 21,867.57 = 13,646.76 : x
  2. Step 2: Convert to fraction form
    15,861.09/21,867.57 = 13,646.76/x
  3. Step 3: Cross multiply
    15,861.09x = 21,867.57 × 13,646.76
  4. Step 4: Simplify right side
    15,861.09x = 298,421,479.57
  5. Step 5: Solve for x
    x = 298,421,479.57/15,861.09
  6. Step 6: Final answer
    x = 18,814.69

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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.