Home / 27,816.78-38,385-15,878.46

Finding the Fourth Proportional to 27,816.78, 38,385 and 15,878.46

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Solution

The fourth proportional to 27,816.78, 38,385 and 15,878.46 is: 21,911.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,816.78 : 38,385 = 15,878.46 : x
  2. Step 2: Convert to fraction form
    27,816.78/38,385 = 15,878.46/x
  3. Step 3: Cross multiply
    27,816.78x = 38,385 × 15,878.46
  4. Step 4: Simplify right side
    27,816.78x = 609,494,687.10
  5. Step 5: Solve for x
    x = 609,494,687.10/27,816.78
  6. Step 6: Final answer
    x = 21,911.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.