Home / 5,108.49-7,663.65-1,990.20

Finding the Fourth Proportional to 5,108.49, 7,663.65 and 1,990.20

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Solution

The fourth proportional to 5,108.49, 7,663.65 and 1,990.20 is: 2,985.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,108.49 : 7,663.65 = 1,990.20 : x
  2. Step 2: Convert to fraction form
    5,108.49/7,663.65 = 1,990.20/x
  3. Step 3: Cross multiply
    5,108.49x = 7,663.65 × 1,990.20
  4. Step 4: Simplify right side
    5,108.49x = 15,252,157.91
  5. Step 5: Solve for x
    x = 15,252,157.91/5,108.49
  6. Step 6: Final answer
    x = 2,985.65

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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.