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Finding the Fourth Proportional to 21,089.59, 31,626.93 and 9,249.10

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Solution

The fourth proportional to 21,089.59, 31,626.93 and 9,249.10 is: 13,870.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.59 : 31,626.93 = 9,249.10 : x
  2. Step 2: Convert to fraction form
    21,089.59/31,626.93 = 9,249.10/x
  3. Step 3: Cross multiply
    21,089.59x = 31,626.93 × 9,249.10
  4. Step 4: Simplify right side
    21,089.59x = 292,520,638.26
  5. Step 5: Solve for x
    x = 292,520,638.26/21,089.59
  6. Step 6: Final answer
    x = 13,870.38

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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.