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Finding the Fourth Proportional to 34,398.81, 51,612.80 and 18,798.21

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Solution

The fourth proportional to 34,398.81, 51,612.80 and 18,798.21 is: 28,205.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,398.81 : 51,612.80 = 18,798.21 : x
  2. Step 2: Convert to fraction form
    34,398.81/51,612.80 = 18,798.21/x
  3. Step 3: Cross multiply
    34,398.81x = 51,612.80 × 18,798.21
  4. Step 4: Simplify right side
    34,398.81x = 970,228,159.10
  5. Step 5: Solve for x
    x = 970,228,159.10/34,398.81
  6. Step 6: Final answer
    x = 28,205.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.