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Finding the Fourth Proportional to 30,007.50, 44,980.53 and 12,487.50

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Solution

The fourth proportional to 30,007.50, 44,980.53 and 12,487.50 is: 18,718.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,007.50 : 44,980.53 = 12,487.50 : x
  2. Step 2: Convert to fraction form
    30,007.50/44,980.53 = 12,487.50/x
  3. Step 3: Cross multiply
    30,007.50x = 44,980.53 × 12,487.50
  4. Step 4: Simplify right side
    30,007.50x = 561,694,368.38
  5. Step 5: Solve for x
    x = 561,694,368.38/30,007.50
  6. Step 6: Final answer
    x = 18,718.47

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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.