Home / 21,036.85-31,547.07-7,882.04

Finding the Fourth Proportional to 21,036.85, 31,547.07 and 7,882.04

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Solution

The fourth proportional to 21,036.85, 31,547.07 and 7,882.04 is: 11,819.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.85 : 31,547.07 = 7,882.04 : x
  2. Step 2: Convert to fraction form
    21,036.85/31,547.07 = 7,882.04/x
  3. Step 3: Cross multiply
    21,036.85x = 31,547.07 × 7,882.04
  4. Step 4: Simplify right side
    21,036.85x = 248,655,346.49
  5. Step 5: Solve for x
    x = 248,655,346.49/21,036.85
  6. Step 6: Final answer
    x = 11,819.99

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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.