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Finding the Fourth Proportional to 20,503.79, 30,762.50 and 7,357.18

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Solution

The fourth proportional to 20,503.79, 30,762.50 and 7,357.18 is: 11,038.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,503.79 : 30,762.50 = 7,357.18 : x
  2. Step 2: Convert to fraction form
    20,503.79/30,762.50 = 7,357.18/x
  3. Step 3: Cross multiply
    20,503.79x = 30,762.50 × 7,357.18
  4. Step 4: Simplify right side
    20,503.79x = 226,325,136.06
  5. Step 5: Solve for x
    x = 226,325,136.06/20,503.79
  6. Step 6: Final answer
    x = 11,038.21

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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.