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Finding the Fourth Proportional to 28,417.50, 42,627.06 and 7,641

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Solution

The fourth proportional to 28,417.50, 42,627.06 and 7,641 is: 11,461.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,417.50 : 42,627.06 = 7,641 : x
  2. Step 2: Convert to fraction form
    28,417.50/42,627.06 = 7,641/x
  3. Step 3: Cross multiply
    28,417.50x = 42,627.06 × 7,641
  4. Step 4: Simplify right side
    28,417.50x = 325,713,365.46
  5. Step 5: Solve for x
    x = 325,713,365.46/28,417.50
  6. Step 6: Final answer
    x = 11,461.72

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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.