Home / 14,789.61-20,388.47-9,120.55

Finding the Fourth Proportional to 14,789.61, 20,388.47 and 9,120.55

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Solution

The fourth proportional to 14,789.61, 20,388.47 and 9,120.55 is: 12,573.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,789.61 : 20,388.47 = 9,120.55 : x
  2. Step 2: Convert to fraction form
    14,789.61/20,388.47 = 9,120.55/x
  3. Step 3: Cross multiply
    14,789.61x = 20,388.47 × 9,120.55
  4. Step 4: Simplify right side
    14,789.61x = 185,954,060.06
  5. Step 5: Solve for x
    x = 185,954,060.06/14,789.61
  6. Step 6: Final answer
    x = 12,573.29

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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.