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Finding the Fourth Proportional to 30,090, 45,121.32 and 17,613.18

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Solution

The fourth proportional to 30,090, 45,121.32 and 17,613.18 is: 26,411.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,090 : 45,121.32 = 17,613.18 : x
  2. Step 2: Convert to fraction form
    30,090/45,121.32 = 17,613.18/x
  3. Step 3: Cross multiply
    30,090x = 45,121.32 × 17,613.18
  4. Step 4: Simplify right side
    30,090x = 794,729,931.00
  5. Step 5: Solve for x
    x = 794,729,931.00/30,090
  6. Step 6: Final answer
    x = 26,411.76

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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.