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Finding the Fourth Proportional to 30,386.60, 45,579.90 and 17,045.90

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Solution

The fourth proportional to 30,386.60, 45,579.90 and 17,045.90 is: 25,568.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,386.60 : 45,579.90 = 17,045.90 : x
  2. Step 2: Convert to fraction form
    30,386.60/45,579.90 = 17,045.90/x
  3. Step 3: Cross multiply
    30,386.60x = 45,579.90 × 17,045.90
  4. Step 4: Simplify right side
    30,386.60x = 776,950,417.41
  5. Step 5: Solve for x
    x = 776,950,417.41/30,386.60
  6. Step 6: Final answer
    x = 25,568.85

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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.