Home / 4,680.80-7,020.40-1,393.12

Finding the Fourth Proportional to 4,680.80, 7,020.40 and 1,393.12

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Solution

The fourth proportional to 4,680.80, 7,020.40 and 1,393.12 is: 2,089.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,680.80 : 7,020.40 = 1,393.12 : x
  2. Step 2: Convert to fraction form
    4,680.80/7,020.40 = 1,393.12/x
  3. Step 3: Cross multiply
    4,680.80x = 7,020.40 × 1,393.12
  4. Step 4: Simplify right side
    4,680.80x = 9,780,292.20
  5. Step 5: Solve for x
    x = 9,780,292.20/4,680.80
  6. Step 6: Final answer
    x = 2,089.45

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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.