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Finding the Fourth Proportional to 30,480.64, 42,064.48 and 17,905.28

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Solution

The fourth proportional to 30,480.64, 42,064.48 and 17,905.28 is: 24,709.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,480.64 : 42,064.48 = 17,905.28 : x
  2. Step 2: Convert to fraction form
    30,480.64/42,064.48 = 17,905.28/x
  3. Step 3: Cross multiply
    30,480.64x = 42,064.48 × 17,905.28
  4. Step 4: Simplify right side
    30,480.64x = 753,176,292.45
  5. Step 5: Solve for x
    x = 753,176,292.45/30,480.64
  6. Step 6: Final answer
    x = 24,709.99

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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.