Home / 20,750.78-28,602.52-14,386.61

Finding the Fourth Proportional to 20,750.78, 28,602.52 and 14,386.61

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Solution

The fourth proportional to 20,750.78, 28,602.52 and 14,386.61 is: 19,830.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.78 : 28,602.52 = 14,386.61 : x
  2. Step 2: Convert to fraction form
    20,750.78/28,602.52 = 14,386.61/x
  3. Step 3: Cross multiply
    20,750.78x = 28,602.52 × 14,386.61
  4. Step 4: Simplify right side
    20,750.78x = 411,493,335.80
  5. Step 5: Solve for x
    x = 411,493,335.80/20,750.78
  6. Step 6: Final answer
    x = 19,830.26

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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.