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Finding the Fourth Proportional to 30,421.64, 45,536.84 and 19,340.84

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Solution

The fourth proportional to 30,421.64, 45,536.84 and 19,340.84 is: 28,950.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,421.64 : 45,536.84 = 19,340.84 : x
  2. Step 2: Convert to fraction form
    30,421.64/45,536.84 = 19,340.84/x
  3. Step 3: Cross multiply
    30,421.64x = 45,536.84 × 19,340.84
  4. Step 4: Simplify right side
    30,421.64x = 880,720,736.55
  5. Step 5: Solve for x
    x = 880,720,736.55/30,421.64
  6. Step 6: Final answer
    x = 28,950.47

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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.