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Finding the Fourth Proportional to 30,465.56, 45,615.90 and 19,909.28

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Solution

The fourth proportional to 30,465.56, 45,615.90 and 19,909.28 is: 29,810.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,465.56 : 45,615.90 = 19,909.28 : x
  2. Step 2: Convert to fraction form
    30,465.56/45,615.90 = 19,909.28/x
  3. Step 3: Cross multiply
    30,465.56x = 45,615.90 × 19,909.28
  4. Step 4: Simplify right side
    30,465.56x = 908,179,725.55
  5. Step 5: Solve for x
    x = 908,179,725.55/30,465.56
  6. Step 6: Final answer
    x = 29,810.05

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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.