Home / 20,156.30-27,807.94-12,985.68

Finding the Fourth Proportional to 20,156.30, 27,807.94 and 12,985.68

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Solution

The fourth proportional to 20,156.30, 27,807.94 and 12,985.68 is: 17,915.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.30 : 27,807.94 = 12,985.68 : x
  2. Step 2: Convert to fraction form
    20,156.30/27,807.94 = 12,985.68/x
  3. Step 3: Cross multiply
    20,156.30x = 27,807.94 × 12,985.68
  4. Step 4: Simplify right side
    20,156.30x = 361,105,010.30
  5. Step 5: Solve for x
    x = 361,105,010.30/20,156.30
  6. Step 6: Final answer
    x = 17,915.24

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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.