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Finding the Fourth Proportional to 30,487.98, 45,960.48 and 28,455.89

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Solution

The fourth proportional to 30,487.98, 45,960.48 and 28,455.89 is: 42,897.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,487.98 : 45,960.48 = 28,455.89 : x
  2. Step 2: Convert to fraction form
    30,487.98/45,960.48 = 28,455.89/x
  3. Step 3: Cross multiply
    30,487.98x = 45,960.48 × 28,455.89
  4. Step 4: Simplify right side
    30,487.98x = 1,307,846,363.23
  5. Step 5: Solve for x
    x = 1,307,846,363.23/30,487.98
  6. Step 6: Final answer
    x = 42,897.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.