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Finding the Fourth Proportional to 30,788.59, 42,488.31 and 16,641.44

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Solution

The fourth proportional to 30,788.59, 42,488.31 and 16,641.44 is: 22,965.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,788.59 : 42,488.31 = 16,641.44 : x
  2. Step 2: Convert to fraction form
    30,788.59/42,488.31 = 16,641.44/x
  3. Step 3: Cross multiply
    30,788.59x = 42,488.31 × 16,641.44
  4. Step 4: Simplify right side
    30,788.59x = 707,066,661.57
  5. Step 5: Solve for x
    x = 707,066,661.57/30,788.59
  6. Step 6: Final answer
    x = 22,965.22

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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.