Home / 21,007.85-31,482.08-11,651.99

Finding the Fourth Proportional to 21,007.85, 31,482.08 and 11,651.99

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Solution

The fourth proportional to 21,007.85, 31,482.08 and 11,651.99 is: 17,461.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.85 : 31,482.08 = 11,651.99 : x
  2. Step 2: Convert to fraction form
    21,007.85/31,482.08 = 11,651.99/x
  3. Step 3: Cross multiply
    21,007.85x = 31,482.08 × 11,651.99
  4. Step 4: Simplify right side
    21,007.85x = 366,828,823.08
  5. Step 5: Solve for x
    x = 366,828,823.08/21,007.85
  6. Step 6: Final answer
    x = 17,461.51

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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.