Home / 21,317.10-31,975.65-12,101.10

Finding the Fourth Proportional to 21,317.10, 31,975.65 and 12,101.10

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Solution

The fourth proportional to 21,317.10, 31,975.65 and 12,101.10 is: 18,151.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.10 : 31,975.65 = 12,101.10 : x
  2. Step 2: Convert to fraction form
    21,317.10/31,975.65 = 12,101.10/x
  3. Step 3: Cross multiply
    21,317.10x = 31,975.65 × 12,101.10
  4. Step 4: Simplify right side
    21,317.10x = 386,940,538.22
  5. Step 5: Solve for x
    x = 386,940,538.22/21,317.10
  6. Step 6: Final answer
    x = 18,151.65

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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.