Home / 21,230.67-31,857.05-11,864.91

Finding the Fourth Proportional to 21,230.67, 31,857.05 and 11,864.91

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Solution

The fourth proportional to 21,230.67, 31,857.05 and 11,864.91 is: 17,803.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.67 : 31,857.05 = 11,864.91 : x
  2. Step 2: Convert to fraction form
    21,230.67/31,857.05 = 11,864.91/x
  3. Step 3: Cross multiply
    21,230.67x = 31,857.05 × 11,864.91
  4. Step 4: Simplify right side
    21,230.67x = 377,980,971.79
  5. Step 5: Solve for x
    x = 377,980,971.79/21,230.67
  6. Step 6: Final answer
    x = 17,803.53

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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.