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Finding the Fourth Proportional to 30,431.25, 45,648.95 and 9,369.99

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Solution

The fourth proportional to 30,431.25, 45,648.95 and 9,369.99 is: 14,055.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,431.25 : 45,648.95 = 9,369.99 : x
  2. Step 2: Convert to fraction form
    30,431.25/45,648.95 = 9,369.99/x
  3. Step 3: Cross multiply
    30,431.25x = 45,648.95 × 9,369.99
  4. Step 4: Simplify right side
    30,431.25x = 427,730,158.16
  5. Step 5: Solve for x
    x = 427,730,158.16/30,431.25
  6. Step 6: Final answer
    x = 14,055.62

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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.