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Finding the Fourth Proportional to 30,275.40, 45,421.20 and 21,527.40

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Solution

The fourth proportional to 30,275.40, 45,421.20 and 21,527.40 is: 32,296.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,275.40 : 45,421.20 = 21,527.40 : x
  2. Step 2: Convert to fraction form
    30,275.40/45,421.20 = 21,527.40/x
  3. Step 3: Cross multiply
    30,275.40x = 45,421.20 × 21,527.40
  4. Step 4: Simplify right side
    30,275.40x = 977,800,340.88
  5. Step 5: Solve for x
    x = 977,800,340.88/30,275.40
  6. Step 6: Final answer
    x = 32,296.86

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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.