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Finding the Fourth Proportional to 21,772.40, 32,707.20 and 20,946.20

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Solution

The fourth proportional to 21,772.40, 32,707.20 and 20,946.20 is: 31,466.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,772.40 : 32,707.20 = 20,946.20 : x
  2. Step 2: Convert to fraction form
    21,772.40/32,707.20 = 20,946.20/x
  3. Step 3: Cross multiply
    21,772.40x = 32,707.20 × 20,946.20
  4. Step 4: Simplify right side
    21,772.40x = 685,091,552.64
  5. Step 5: Solve for x
    x = 685,091,552.64/21,772.40
  6. Step 6: Final answer
    x = 31,466.06

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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.