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Finding the Fourth Proportional to 28,009.71, 38,653.01 and 15,263.43

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Solution

The fourth proportional to 28,009.71, 38,653.01 and 15,263.43 is: 21,063.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.71 : 38,653.01 = 15,263.43 : x
  2. Step 2: Convert to fraction form
    28,009.71/38,653.01 = 15,263.43/x
  3. Step 3: Cross multiply
    28,009.71x = 38,653.01 × 15,263.43
  4. Step 4: Simplify right side
    28,009.71x = 589,977,512.42
  5. Step 5: Solve for x
    x = 589,977,512.42/28,009.71
  6. Step 6: Final answer
    x = 21,063.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.