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Finding the Fourth Proportional to 14,886.54, 20,539.08 and 10,638.90

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Solution

The fourth proportional to 14,886.54, 20,539.08 and 10,638.90 is: 14,678.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,886.54 : 20,539.08 = 10,638.90 : x
  2. Step 2: Convert to fraction form
    14,886.54/20,539.08 = 10,638.90/x
  3. Step 3: Cross multiply
    14,886.54x = 20,539.08 × 10,638.90
  4. Step 4: Simplify right side
    14,886.54x = 218,513,218.21
  5. Step 5: Solve for x
    x = 218,513,218.21/14,886.54
  6. Step 6: Final answer
    x = 14,678.58

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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.