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Finding the Fourth Proportional to 22,809.70, 31,461.55 and 20,927.51

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Solution

The fourth proportional to 22,809.70, 31,461.55 and 20,927.51 is: 28,865.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,809.70 : 31,461.55 = 20,927.51 : x
  2. Step 2: Convert to fraction form
    22,809.70/31,461.55 = 20,927.51/x
  3. Step 3: Cross multiply
    22,809.70x = 31,461.55 × 20,927.51
  4. Step 4: Simplify right side
    22,809.70x = 658,411,902.24
  5. Step 5: Solve for x
    x = 658,411,902.24/22,809.70
  6. Step 6: Final answer
    x = 28,865.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.