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Finding the Fourth Proportional to 30,281.78, 45,420.78 and 11,302.72

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Solution

The fourth proportional to 30,281.78, 45,420.78 and 11,302.72 is: 16,953.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,281.78 : 45,420.78 = 11,302.72 : x
  2. Step 2: Convert to fraction form
    30,281.78/45,420.78 = 11,302.72/x
  3. Step 3: Cross multiply
    30,281.78x = 45,420.78 × 11,302.72
  4. Step 4: Simplify right side
    30,281.78x = 513,378,358.52
  5. Step 5: Solve for x
    x = 513,378,358.52/30,281.78
  6. Step 6: Final answer
    x = 16,953.37

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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.