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Finding the Fourth Proportional to 6,670.05, 10,006.52 and 1,990.10

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Solution

The fourth proportional to 6,670.05, 10,006.52 and 1,990.10 is: 2,985.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,670.05 : 10,006.52 = 1,990.10 : x
  2. Step 2: Convert to fraction form
    6,670.05/10,006.52 = 1,990.10/x
  3. Step 3: Cross multiply
    6,670.05x = 10,006.52 × 1,990.10
  4. Step 4: Simplify right side
    6,670.05x = 19,913,915.47
  5. Step 5: Solve for x
    x = 19,913,915.47/6,670.05
  6. Step 6: Final answer
    x = 2,985.57

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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.