Home / 18,438.19-27,618.40-12,518.71

Finding the Fourth Proportional to 18,438.19, 27,618.40 and 12,518.71

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Solution

The fourth proportional to 18,438.19, 27,618.40 and 12,518.71 is: 18,751.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.19 : 27,618.40 = 12,518.71 : x
  2. Step 2: Convert to fraction form
    18,438.19/27,618.40 = 12,518.71/x
  3. Step 3: Cross multiply
    18,438.19x = 27,618.40 × 12,518.71
  4. Step 4: Simplify right side
    18,438.19x = 345,746,740.26
  5. Step 5: Solve for x
    x = 345,746,740.26/18,438.19
  6. Step 6: Final answer
    x = 18,751.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.