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Finding the Fourth Proportional to 30,388.60, 41,935.28 and 16,590.40

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Solution

The fourth proportional to 30,388.60, 41,935.28 and 16,590.40 is: 22,894.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,388.60 : 41,935.28 = 16,590.40 : x
  2. Step 2: Convert to fraction form
    30,388.60/41,935.28 = 16,590.40/x
  3. Step 3: Cross multiply
    30,388.60x = 41,935.28 × 16,590.40
  4. Step 4: Simplify right side
    30,388.60x = 695,723,069.31
  5. Step 5: Solve for x
    x = 695,723,069.31/30,388.60
  6. Step 6: Final answer
    x = 22,894.21

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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.