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Finding the Fourth Proportional to 30,602.30, 45,904.59 and 8,415.72

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Solution

The fourth proportional to 30,602.30, 45,904.59 and 8,415.72 is: 12,623.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,602.30 : 45,904.59 = 8,415.72 : x
  2. Step 2: Convert to fraction form
    30,602.30/45,904.59 = 8,415.72/x
  3. Step 3: Cross multiply
    30,602.30x = 45,904.59 × 8,415.72
  4. Step 4: Simplify right side
    30,602.30x = 386,320,176.15
  5. Step 5: Solve for x
    x = 386,320,176.15/30,602.30
  6. Step 6: Final answer
    x = 12,623.90

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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.