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Finding the Fourth Proportional to 12,528.45, 18,865.85 and 9,264.51

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Solution

The fourth proportional to 12,528.45, 18,865.85 and 9,264.51 is: 13,950.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,528.45 : 18,865.85 = 9,264.51 : x
  2. Step 2: Convert to fraction form
    12,528.45/18,865.85 = 9,264.51/x
  3. Step 3: Cross multiply
    12,528.45x = 18,865.85 × 9,264.51
  4. Step 4: Simplify right side
    12,528.45x = 174,782,809.66
  5. Step 5: Solve for x
    x = 174,782,809.66/12,528.45
  6. Step 6: Final answer
    x = 13,950.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.