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Finding the Fourth Proportional to 20,020.60, 28,058 and 20,020.60

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Solution

The fourth proportional to 20,020.60, 28,058 and 20,020.60 is: 28,058

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,020.60 : 28,058 = 20,020.60 : x
  2. Step 2: Convert to fraction form
    20,020.60/28,058 = 20,020.60/x
  3. Step 3: Cross multiply
    20,020.60x = 28,058 × 20,020.60
  4. Step 4: Simplify right side
    20,020.60x = 561,737,994.80
  5. Step 5: Solve for x
    x = 561,737,994.80/20,020.60
  6. Step 6: Final answer
    x = 28,058

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.