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Finding the Fourth Proportional to 30,410.32, 41,964.85 and 16,978.94

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Solution

The fourth proportional to 30,410.32, 41,964.85 and 16,978.94 is: 23,430.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,410.32 : 41,964.85 = 16,978.94 : x
  2. Step 2: Convert to fraction form
    30,410.32/41,964.85 = 16,978.94/x
  3. Step 3: Cross multiply
    30,410.32x = 41,964.85 × 16,978.94
  4. Step 4: Simplify right side
    30,410.32x = 712,518,670.26
  5. Step 5: Solve for x
    x = 712,518,670.26/30,410.32
  6. Step 6: Final answer
    x = 23,430.16

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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.