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Finding the Fourth Proportional to 9,999.90, 14,985.45 and 4,448.70

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Solution

The fourth proportional to 9,999.90, 14,985.45 and 4,448.70 is: 6,666.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,999.90 : 14,985.45 = 4,448.70 : x
  2. Step 2: Convert to fraction form
    9,999.90/14,985.45 = 4,448.70/x
  3. Step 3: Cross multiply
    9,999.90x = 14,985.45 × 4,448.70
  4. Step 4: Simplify right side
    9,999.90x = 66,665,771.42
  5. Step 5: Solve for x
    x = 66,665,771.42/9,999.90
  6. Step 6: Final answer
    x = 6,666.64

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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.