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Finding the Fourth Proportional to 28,417.88, 42,626.76 and 7,641.40

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Solution

The fourth proportional to 28,417.88, 42,626.76 and 7,641.40 is: 11,462.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,417.88 : 42,626.76 = 7,641.40 : x
  2. Step 2: Convert to fraction form
    28,417.88/42,626.76 = 7,641.40/x
  3. Step 3: Cross multiply
    28,417.88x = 42,626.76 × 7,641.40
  4. Step 4: Simplify right side
    28,417.88x = 325,728,123.86
  5. Step 5: Solve for x
    x = 325,728,123.86/28,417.88
  6. Step 6: Final answer
    x = 11,462.08

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.