Home / 20,443.95-28,186.59-13,718.91

Finding the Fourth Proportional to 20,443.95, 28,186.59 and 13,718.91

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Solution

The fourth proportional to 20,443.95, 28,186.59 and 13,718.91 is: 18,914.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,443.95 : 28,186.59 = 13,718.91 : x
  2. Step 2: Convert to fraction form
    20,443.95/28,186.59 = 13,718.91/x
  3. Step 3: Cross multiply
    20,443.95x = 28,186.59 × 13,718.91
  4. Step 4: Simplify right side
    20,443.95x = 386,689,291.42
  5. Step 5: Solve for x
    x = 386,689,291.42/20,443.95
  6. Step 6: Final answer
    x = 18,914.61

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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.