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Finding the Fourth Proportional to 20,526.80, 30,792.64 and 7,378.08

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Solution

The fourth proportional to 20,526.80, 30,792.64 and 7,378.08 is: 11,068.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,526.80 : 30,792.64 = 7,378.08 : x
  2. Step 2: Convert to fraction form
    20,526.80/30,792.64 = 7,378.08/x
  3. Step 3: Cross multiply
    20,526.80x = 30,792.64 × 7,378.08
  4. Step 4: Simplify right side
    20,526.80x = 227,190,561.33
  5. Step 5: Solve for x
    x = 227,190,561.33/20,526.80
  6. Step 6: Final answer
    x = 11,068.00

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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.