Home / 20,838.02-28,756.64-12,340.61

Finding the Fourth Proportional to 20,838.02, 28,756.64 and 12,340.61

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Solution

The fourth proportional to 20,838.02, 28,756.64 and 12,340.61 is: 17,030.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.02 : 28,756.64 = 12,340.61 : x
  2. Step 2: Convert to fraction form
    20,838.02/28,756.64 = 12,340.61/x
  3. Step 3: Cross multiply
    20,838.02x = 28,756.64 × 12,340.61
  4. Step 4: Simplify right side
    20,838.02x = 354,874,273.66
  5. Step 5: Solve for x
    x = 354,874,273.66/20,838.02
  6. Step 6: Final answer
    x = 17,030.14

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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.