Home / 7,127.20-10,690.80-1,862.20

Finding the Fourth Proportional to 7,127.20, 10,690.80 and 1,862.20

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Solution

The fourth proportional to 7,127.20, 10,690.80 and 1,862.20 is: 2,793.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,127.20 : 10,690.80 = 1,862.20 : x
  2. Step 2: Convert to fraction form
    7,127.20/10,690.80 = 1,862.20/x
  3. Step 3: Cross multiply
    7,127.20x = 10,690.80 × 1,862.20
  4. Step 4: Simplify right side
    7,127.20x = 19,908,407.76
  5. Step 5: Solve for x
    x = 19,908,407.76/7,127.20
  6. Step 6: Final answer
    x = 2,793.30

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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.