Home / 19,929.50-27,503.44-12,380

Finding the Fourth Proportional to 19,929.50, 27,503.44 and 12,380

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Solution

The fourth proportional to 19,929.50, 27,503.44 and 12,380 is: 17,084.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,929.50 : 27,503.44 = 12,380 : x
  2. Step 2: Convert to fraction form
    19,929.50/27,503.44 = 12,380/x
  3. Step 3: Cross multiply
    19,929.50x = 27,503.44 × 12,380
  4. Step 4: Simplify right side
    19,929.50x = 340,492,587.20
  5. Step 5: Solve for x
    x = 340,492,587.20/19,929.50
  6. Step 6: Final answer
    x = 17,084.85

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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.