Home / 6,920.19-10,380.51-1,990.08

Finding the Fourth Proportional to 6,920.19, 10,380.51 and 1,990.08

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Solution

The fourth proportional to 6,920.19, 10,380.51 and 1,990.08 is: 2,985.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.19 : 10,380.51 = 1,990.08 : x
  2. Step 2: Convert to fraction form
    6,920.19/10,380.51 = 1,990.08/x
  3. Step 3: Cross multiply
    6,920.19x = 10,380.51 × 1,990.08
  4. Step 4: Simplify right side
    6,920.19x = 20,658,045.34
  5. Step 5: Solve for x
    x = 20,658,045.34/6,920.19
  6. Step 6: Final answer
    x = 2,985.18

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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.