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Finding the Fourth Proportional to 21,062.87, 31,594.22 and 8,580.11

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Solution

The fourth proportional to 21,062.87, 31,594.22 and 8,580.11 is: 12,870.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,062.87 : 31,594.22 = 8,580.11 : x
  2. Step 2: Convert to fraction form
    21,062.87/31,594.22 = 8,580.11/x
  3. Step 3: Cross multiply
    21,062.87x = 31,594.22 × 8,580.11
  4. Step 4: Simplify right side
    21,062.87x = 271,081,840.06
  5. Step 5: Solve for x
    x = 271,081,840.06/21,062.87
  6. Step 6: Final answer
    x = 12,870.13

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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.