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Finding the Fourth Proportional to 30,379.54, 45,569.32 and 10,389.18

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Solution

The fourth proportional to 30,379.54, 45,569.32 and 10,389.18 is: 15,583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,379.54 : 45,569.32 = 10,389.18 : x
  2. Step 2: Convert to fraction form
    30,379.54/45,569.32 = 10,389.18/x
  3. Step 3: Cross multiply
    30,379.54x = 45,569.32 × 10,389.18
  4. Step 4: Simplify right side
    30,379.54x = 473,427,867.96
  5. Step 5: Solve for x
    x = 473,427,867.96/30,379.54
  6. Step 6: Final answer
    x = 15,583.77

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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.