Home / 20,887.48-31,338.24-7,740.91

Finding the Fourth Proportional to 20,887.48, 31,338.24 and 7,740.91

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Solution

The fourth proportional to 20,887.48, 31,338.24 and 7,740.91 is: 11,613.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.48 : 31,338.24 = 7,740.91 : x
  2. Step 2: Convert to fraction form
    20,887.48/31,338.24 = 7,740.91/x
  3. Step 3: Cross multiply
    20,887.48x = 31,338.24 × 7,740.91
  4. Step 4: Simplify right side
    20,887.48x = 242,586,495.40
  5. Step 5: Solve for x
    x = 242,586,495.40/20,887.48
  6. Step 6: Final answer
    x = 11,613.97

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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.