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Finding the Fourth Proportional to 9,990.54, 14,980.55 and 4,445.55

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Solution

The fourth proportional to 9,990.54, 14,980.55 and 4,445.55 is: 6,665.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.54 : 14,980.55 = 4,445.55 : x
  2. Step 2: Convert to fraction form
    9,990.54/14,980.55 = 4,445.55/x
  3. Step 3: Cross multiply
    9,990.54x = 14,980.55 × 4,445.55
  4. Step 4: Simplify right side
    9,990.54x = 66,596,761.82
  5. Step 5: Solve for x
    x = 66,596,761.82/9,990.54
  6. Step 6: Final answer
    x = 6,665.98

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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.