Home / 18,870.71-28,317.94-10,556.12

Finding the Fourth Proportional to 18,870.71, 28,317.94 and 10,556.12

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Solution

The fourth proportional to 18,870.71, 28,317.94 and 10,556.12 is: 15,840.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.71 : 28,317.94 = 10,556.12 : x
  2. Step 2: Convert to fraction form
    18,870.71/28,317.94 = 10,556.12/x
  3. Step 3: Cross multiply
    18,870.71x = 28,317.94 × 10,556.12
  4. Step 4: Simplify right side
    18,870.71x = 298,927,617.20
  5. Step 5: Solve for x
    x = 298,927,617.20/18,870.71
  6. Step 6: Final answer
    x = 15,840.83

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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.