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Finding the Fourth Proportional to 20,594.44, 28,420.17 and 11,643.71

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Solution

The fourth proportional to 20,594.44, 28,420.17 and 11,643.71 is: 16,068.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,594.44 : 28,420.17 = 11,643.71 : x
  2. Step 2: Convert to fraction form
    20,594.44/28,420.17 = 11,643.71/x
  3. Step 3: Cross multiply
    20,594.44x = 28,420.17 × 11,643.71
  4. Step 4: Simplify right side
    20,594.44x = 330,916,031.87
  5. Step 5: Solve for x
    x = 330,916,031.87/20,594.44
  6. Step 6: Final answer
    x = 16,068.22

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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.