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Finding the Fourth Proportional to 30,603.62, 45,904.86 and 12,587.90

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Solution

The fourth proportional to 30,603.62, 45,904.86 and 12,587.90 is: 18,881.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,603.62 : 45,904.86 = 12,587.90 : x
  2. Step 2: Convert to fraction form
    30,603.62/45,904.86 = 12,587.90/x
  3. Step 3: Cross multiply
    30,603.62x = 45,904.86 × 12,587.90
  4. Step 4: Simplify right side
    30,603.62x = 577,845,557.67
  5. Step 5: Solve for x
    x = 577,845,557.67/30,603.62
  6. Step 6: Final answer
    x = 18,881.61

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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.