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Finding the Fourth Proportional to 56,407.68, 84,618.72 and 18,951.68

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Solution

The fourth proportional to 56,407.68, 84,618.72 and 18,951.68 is: 28,429.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,407.68 : 84,618.72 = 18,951.68 : x
  2. Step 2: Convert to fraction form
    56,407.68/84,618.72 = 18,951.68/x
  3. Step 3: Cross multiply
    56,407.68x = 84,618.72 × 18,951.68
  4. Step 4: Simplify right side
    56,407.68x = 1,603,666,903.45
  5. Step 5: Solve for x
    x = 1,603,666,903.45/56,407.68
  6. Step 6: Final answer
    x = 28,429.94

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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.