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Finding the Fourth Proportional to 36,510.80, 54,809.40 and 20,728.40

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Solution

The fourth proportional to 36,510.80, 54,809.40 and 20,728.40 is: 31,117.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,510.80 : 54,809.40 = 20,728.40 : x
  2. Step 2: Convert to fraction form
    36,510.80/54,809.40 = 20,728.40/x
  3. Step 3: Cross multiply
    36,510.80x = 54,809.40 × 20,728.40
  4. Step 4: Simplify right side
    36,510.80x = 1,136,111,166.96
  5. Step 5: Solve for x
    x = 1,136,111,166.96/36,510.80
  6. Step 6: Final answer
    x = 31,117.13

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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.