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Finding the Fourth Proportional to 18,820.80, 25,968.80 and 10,435.52

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Solution

The fourth proportional to 18,820.80, 25,968.80 and 10,435.52 is: 14,398.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.80 : 25,968.80 = 10,435.52 : x
  2. Step 2: Convert to fraction form
    18,820.80/25,968.80 = 10,435.52/x
  3. Step 3: Cross multiply
    18,820.80x = 25,968.80 × 10,435.52
  4. Step 4: Simplify right side
    18,820.80x = 270,997,931.78
  5. Step 5: Solve for x
    x = 270,997,931.78/18,820.80
  6. Step 6: Final answer
    x = 14,398.85

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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.