Home / 20,688.77-31,041.57-11,317.43

Finding the Fourth Proportional to 20,688.77, 31,041.57 and 11,317.43

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Solution

The fourth proportional to 20,688.77, 31,041.57 and 11,317.43 is: 16,980.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.77 : 31,041.57 = 11,317.43 : x
  2. Step 2: Convert to fraction form
    20,688.77/31,041.57 = 11,317.43/x
  3. Step 3: Cross multiply
    20,688.77x = 31,041.57 × 11,317.43
  4. Step 4: Simplify right side
    20,688.77x = 351,310,795.57
  5. Step 5: Solve for x
    x = 351,310,795.57/20,688.77
  6. Step 6: Final answer
    x = 16,980.75

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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.