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Finding the Fourth Proportional to 7,903.78, 11,856.95 and 2,430.50

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Solution

The fourth proportional to 7,903.78, 11,856.95 and 2,430.50 is: 3,646.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,903.78 : 11,856.95 = 2,430.50 : x
  2. Step 2: Convert to fraction form
    7,903.78/11,856.95 = 2,430.50/x
  3. Step 3: Cross multiply
    7,903.78x = 11,856.95 × 2,430.50
  4. Step 4: Simplify right side
    7,903.78x = 28,818,316.98
  5. Step 5: Solve for x
    x = 28,818,316.98/7,903.78
  6. Step 6: Final answer
    x = 3,646.14

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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.