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Finding the Fourth Proportional to 18,444.70, 25,479.93 and 15,820.30

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Solution

The fourth proportional to 18,444.70, 25,479.93 and 15,820.30 is: 21,854.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,444.70 : 25,479.93 = 15,820.30 : x
  2. Step 2: Convert to fraction form
    18,444.70/25,479.93 = 15,820.30/x
  3. Step 3: Cross multiply
    18,444.70x = 25,479.93 × 15,820.30
  4. Step 4: Simplify right side
    18,444.70x = 403,100,136.58
  5. Step 5: Solve for x
    x = 403,100,136.58/18,444.70
  6. Step 6: Final answer
    x = 21,854.52

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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.