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Finding the Fourth Proportional to 21,868.60, 32,802.90 and 8,015.80

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Solution

The fourth proportional to 21,868.60, 32,802.90 and 8,015.80 is: 12,023.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.60 : 32,802.90 = 8,015.80 : x
  2. Step 2: Convert to fraction form
    21,868.60/32,802.90 = 8,015.80/x
  3. Step 3: Cross multiply
    21,868.60x = 32,802.90 × 8,015.80
  4. Step 4: Simplify right side
    21,868.60x = 262,941,485.82
  5. Step 5: Solve for x
    x = 262,941,485.82/21,868.60
  6. Step 6: Final answer
    x = 12,023.70

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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.