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Finding the Fourth Proportional to 30,449.01, 42,019.65 and 18,510.15

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Solution

The fourth proportional to 30,449.01, 42,019.65 and 18,510.15 is: 25,544.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,449.01 : 42,019.65 = 18,510.15 : x
  2. Step 2: Convert to fraction form
    30,449.01/42,019.65 = 18,510.15/x
  3. Step 3: Cross multiply
    30,449.01x = 42,019.65 × 18,510.15
  4. Step 4: Simplify right side
    30,449.01x = 777,790,024.45
  5. Step 5: Solve for x
    x = 777,790,024.45/30,449.01
  6. Step 6: Final answer
    x = 25,544.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.