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Finding the Fourth Proportional to 30,572.57, 45,858.99 and 8,386.20

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Solution

The fourth proportional to 30,572.57, 45,858.99 and 8,386.20 is: 12,579.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,572.57 : 45,858.99 = 8,386.20 : x
  2. Step 2: Convert to fraction form
    30,572.57/45,858.99 = 8,386.20/x
  3. Step 3: Cross multiply
    30,572.57x = 45,858.99 × 8,386.20
  4. Step 4: Simplify right side
    30,572.57x = 384,582,693.39
  5. Step 5: Solve for x
    x = 384,582,693.39/30,572.57
  6. Step 6: Final answer
    x = 12,579.34

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1.5x scale

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.