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Finding the Fourth Proportional to 21,293.40, 31,946.27 and 8,811.12

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Solution

The fourth proportional to 21,293.40, 31,946.27 and 8,811.12 is: 13,219.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.40 : 31,946.27 = 8,811.12 : x
  2. Step 2: Convert to fraction form
    21,293.40/31,946.27 = 8,811.12/x
  3. Step 3: Cross multiply
    21,293.40x = 31,946.27 × 8,811.12
  4. Step 4: Simplify right side
    21,293.40x = 281,482,374.47
  5. Step 5: Solve for x
    x = 281,482,374.47/21,293.40
  6. Step 6: Final answer
    x = 13,219.23

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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.