Home / 28,648.77-42,929.20-11,999.70

Finding the Fourth Proportional to 28,648.77, 42,929.20 and 11,999.70

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Solution

The fourth proportional to 28,648.77, 42,929.20 and 11,999.70 is: 17,981.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,648.77 : 42,929.20 = 11,999.70 : x
  2. Step 2: Convert to fraction form
    28,648.77/42,929.20 = 11,999.70/x
  3. Step 3: Cross multiply
    28,648.77x = 42,929.20 × 11,999.70
  4. Step 4: Simplify right side
    28,648.77x = 515,137,521.24
  5. Step 5: Solve for x
    x = 515,137,521.24/28,648.77
  6. Step 6: Final answer
    x = 17,981.14

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1.5x scale

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.